Question

According to the system of equations above, what is

the value of x ?
Need someone to explain how to do it

Answer 1

7

Explanation:

try substituting

crossmultyply

x=-9-y

substituting

-9-y=-25+9

y=16

substituting

pick one of the equations

x+y=-9

x-16=-9

x=-9+16

x=7