Question

Find the value of x and y in the following equation.

66-2x=5y
7y+18=-4x

Answer 1

-2x-5y=-66
4x+7y=-18

Multiply the top equation by 2:
-4x-10y=-132
4x+7y=-18

Add the equations together:
-3y=-150
y = 50

Substitute y=50 back into original (I'll just use the first equation):
-2x-5(50)=-66
-2x-250=-66
-2x=184
x = -92

Therefore:
x= -92
y= 50

Answer 2

Thanks :)