18-07-2017
Mathematics

contestada

3(x+2y)=7y-9 when y=3

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ekids22 ekids22

18-07-2017

I'll do it step by step:

3(x+2(3))=7(3)-9
3(x+6)=21-9
3x+18=12

I don't know what x is, so I think that's as much as I can do.

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carleyr01 carleyr01

18-07-2017

First substitute all of the y's with the value of y, like so:
3{x+(2*3)} = 7*3-9
Solve for x.
3{x+(6)} = 21-9
3(x+6)=12
x+6=4
x=(-2)
Hope this helps, please mark brainliest, I am one away from my next rank, and have an amazing day.

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