Q: What is the solution to the linear system of equations?
x + 4y = –8
x – y = 7

A: 8y. 2(4y) = 8y

migzptz|Points 7444|

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Asked 3/16/2013 2:59:20 AM

Updated 3/16/2013 6:40:26 AM

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For the linear system of equations: x + 4y = –8 and x – y = 7, we can solve the second equation for x: x=y+7 and replace on the first equation: y+7+4y=-8 ;

5y=-15 ;

y=-15/5 ;

y=-3.

And x=-3+7=4.

5y=-15 ;

y=-15/5 ;

y=-3.

And x=-3+7=4.

Added 3/16/2013 6:40:26 AM

Rated good by befeeter

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