Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this and **thousands** of other questions.

I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

Join Brainly to access

this expert answer

SEE EXPERT ANSWER

To see the **expert** answer you'll need to create a **free** account at **Brainly**

You can use Matrix method for solving these two equations simultaneously

i only know substitution, graphing, and elimination method and those are the only methods i can use.

try eliminating either a or b

i need to find the value of a and b, not find the solution. like get a or b by itself.

how about let a = 0 or something like that...

not working :(

yeah, i know. but how do i do that?

You can look at either equation, and solve for either variable. It's up to you!

It's all fair game in this problem. So pick and equation and pick a variable to solve for!

ok, 3a+5b=4. let's solve for a.

Okay, you start! I'll watch.

Unless you want to workon it together now; we can do that.

work on*

yeah, let's work on it together.

3a.

3a= -5b+4

\[a= \frac{ 5b+4 }{ 3 }\]

so a=(-5b+4)/3

oopssss. i meant -5b*

yeahh

So, start by substitution!

-20b+16/3+3b=-2

So\[\frac{-20b+16}{3}+3b = -2\]

multiply by 3?

Yeah, I'd do that!

Just so that left-most b isn't divided by it.

-20b+16+3b=-6?

So\[3(\frac{-20b+16}{3}+3b)=3(-2)\]

You have to multiply 3b by 3 as well!

it becomes 9b!

So
-20b+16+9b=-6
:)

I'm sure you'll see it soon.

ohhh. wow, yeah.
b=2?

-20b+16+9b=-6
-20b+9b=-22
-11b=-22
22=11b
22/11=b
2=b
Yeah!

I had to work it out to check, but we got the same thing.

yay :D
thanks eric :D
yur awesome :D

My pleasure! Thank you for doing your part! You did great!

\[a=\frac{-5b+4}{3}=\frac{-5(2)+4}{3}\] and compute... finale!

thanks :D

i just hope i do good on the quiz tomorrow...

a=-10+4/3
a=-6/3
a=-2

My pleasure. Did you get a = 2?

Haha!! Caught me! -2 ! :D

Serves me right for trying to do it in my head.

My responses are out of order. Open Stud is scrambled, it seems.

I'm glad it's not just me! No problem. Good luck with everything!