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What is y = -2x -13 and -7x + 7y =14 ?

please help, thank you if you do)

 Feb 27, 2020
 #1
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Divide  the second equation  through by  7  and we get that

 

-x + y  = 2   which implies  that   y =  2 + x

 

Sub this  into the first equation for y   and we have that

 

2 + x  =  -2x  - 13    rearrange  as

 

3x  =  -15    divide both sides  by  3

 

x  = -5

 

And 

 

y  =  2 + (-5)   =  -3

 

 

cool cool cool

 Feb 27, 2020

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