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anonymous
 one year ago
I know the answer, I just need help wording it. Help me out? (Will fan + medal)

Consider the following pair of equations:
y = −2x + 8
y = x − 1
Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.

I know the answer is (3, 2) I just need help with writing the equation. I'm not good with words
anonymous
 one year ago
I know the answer, I just need help wording it. Help me out? (Will fan + medal)  Consider the following pair of equations: y = −2x + 8 y = x − 1 Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.  I know the answer is (3, 2) I just need help with writing the equation. I'm not good with words

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I know that since we already have what y equals on both equations, you combine them and solve. I just need help writing down what I did in my mind.

alekos
 one year ago
Best ResponseYou've already chosen the best response.0start of by making x1 = 2x+8

alekos
 one year ago
Best ResponseYou've already chosen the best response.0in words that would be " first equation equals the second"

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@alekos Yup! I got that written down to make the equations equal to each other.

iGreen
 one year ago
Best ResponseYou've already chosen the best response.2We can plug in x  1 into the first equation then solve for 'x'..after we get 'x' we plug it back into any of the two equations to find 'y'. Note that the solutions are in (x, y) form.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The question says: Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form. @alekos is correct in saying x1 = 2x +8 but that doesnt fully answer the question.

iGreen
 one year ago
Best ResponseYou've already chosen the best response.2\(\sf y = 2x + 8\) \(\sf y = x  1\) \(\sf x  1 = 2x + 8\_ Add 2x to both sides: \(\sf 3x  1 = 8\) Add 1 to both sides: \(\sf 3x = 9\) Divide 3 to both sides: \(\sf x = 3\) Now plug this into any of the two equations to find 'y': \(\sf y = x  1\) \(\sf y = 3  1\) \(\sf y = 2\) So our solution is \(\sf (3, 2)\).

iGreen
 one year ago
Best ResponseYou've already chosen the best response.2Not sure what happened there.. \(\sf x  1 = 2x + 8\) Add 2x to both sides: \(\sf 3x  1 = 8\)

iGreen
 one year ago
Best ResponseYou've already chosen the best response.2@BPDlkeme234 "We can plug in x  1 into the first equation then solve for 'x'..after we get 'x' we plug it back into any of the two equations to find 'y'."

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes, @iGreen is explaining in words!

iGreen
 one year ago
Best ResponseYou've already chosen the best response.2I said that earlier..lol.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ooops! sorry @iGreen

Study_together
 one year ago
Best ResponseYou've already chosen the best response.0You start with\[x1=2x+8\]Then you subtract 8 from both sides x  1= 2x + 8 8 8 9 Then you divide 2 from both sides 9/2 \[x=4.5\]

Study_together
 one year ago
Best ResponseYou've already chosen the best response.0Can I get what you said?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Study_together this has already been solved by @iGreen

iGreen
 one year ago
Best ResponseYou've already chosen the best response.2More than 1 person can do it \(\Huge\ddot\smile\)
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