hiitscailey hiitscailey

26-05-2017
Mathematics

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7x+2y=-48, I have to solve for either x or y. Then, I have to solve -7x+y=60 for the remainding variable, someone help!

Respuesta :

srnicklaus srnicklaus

26-05-2017

7x+2y=-48 subtract one the one equation from the other to cancel out a variable
-7x+y=60
________
3y=12 divide by 3
y=4 put in y for an equation

-7x + 4=60 subtract 4
-7x=56 divide by -7
x=-8

so, your answer is...x=-8 and y=4

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