Question

Find the solution of this system of equations. seprate the x- and y- valuess with a comma.

x=-4+y
-2x-5y=15

Answer 1

hello :
x=-4+y ...(1)
-2x-5y=15....(2)
subct in (2) :
-2(-4+y)-5y = 15
8-2y-5y = 15
-7y = 7
y = -1
in (1) : x = -4+(-1)
x= -5

Answer 2

( x , y ) = ( -5 , -1 )