A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
Can you show me how to solve this equation using substitution
5y+4x=8
y=5x+10
anonymous
 5 years ago
Can you show me how to solve this equation using substitution 5y+4x=8 y=5x+10

This Question is Closed

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0yes. since it is stated that y = 5x +10; we can just substitute that value for "y" in the other equation and slove for "x"

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.05(5x + 10) + 4x = 8 25x + 50 + 4x = 8 29x + 50 = 8 29x = 8  50 29x = 42 x = 42/29

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0could you show me what I did wrong ill show you how I solved it

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.05y+4x=8 y=5x+10 5(5x+10)+4x=8 25x+50+4x=8 21x+50=8 21x=42 x=2 y=5(20)+10 y=10+10 y=0

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0And I was pretty sure that was the answer.

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.025x + 4x does NOT equal 21x

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Oh sorry I made a typing misatke to y=5(2)+10 should be the one line

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Ithought you subtracted

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0nope; when it says 25 + 4, it actually means to add. That little (+) sign means add....

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I know but I was taught that you did the opposite to get rid of it

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0why would you want to get rid of it? it is a vital part of the equation. Now, if it was on the OTHER side of the (=) sign, you would subtract it from BOTH sides to move it. But, if it is on the SAME side, it is simply addition.... Does that make sense?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Look at your original question that you asked. Are you sure it doesn't say 4x in the problem you were given? 5y  4x = 8?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Hold on let me check quick

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0If you want to move it to the othe side of the (=) sign we do this: 25 + 4 = 29 25 + 4 (4) = 29 (4) 25 = 29  4 But when it is on the same side, just add it together: 25 + 4 = 29 29 = 29

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.05y + 4x = 8 y + 5x = 10 it says ''solving a system of equations by substitution''

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0That is a different set of equations that what you give to begin with; please verify which one is correct please...

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The last one is the correct one

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0ok :) What does "y" equal then?: y = 10  5x substitute that "value" into the top equation to get: 5(10  5x) + 4x = 8 50  25x + 4x = 8 25x + 4x = 8 50 21x = 42 x = 42/21 = 2 Use this solid value of x=2 in the bottom equation to solve for "y" y + 5(2) = 10 y + 10 = 10 y = 10  10 y = 0 x = 2

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0OK thanks im gonna look over this for a minute

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Im sorry im kinda confussed I was taught in a different way and im trying to figure this all out

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0you gave, for the bottom equation: y + 5x = 10 ; to get "y" all by its little lonesome, we need to subtract (5x) from both sides to keep the same values... y +5x 5x = 10  5x y + 0 = 10  5x y = 10  5x Do you see it?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0tell me where I am losing you then, let me know what is confusing you here. And then I can show you the right steps...

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0Can you tell me what the (=) sign means?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0See for Y im somehow got 5x+10

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.05x + 10 is correct, and it is the same thing as 105x am i right or wrong?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Oh so then I did have it right?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0you wrote, and I quote " I got y=5x+10" earlier. If what you meant was "I got y= 5x+10" then yes, you are right...

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Yeah thats what I meant im sorry I cant type today at all

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0:) paper and pencil is always easier when doing math

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Yeah it is but thanks for showing me that now im gonna rework the problem and see if i get it right

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so should the set up be 5(5x+10)+4x=8

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Ok I think im getting this down now

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0you are doing great :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Thanks I have really been having a tough time this year

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0yes; y=0 and x=2. To double check; plug those values into the original equations to see if they are true.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.