Question

Solve by substitution method 2x+y=-2 5x-2y=-23

Answer 1

x= -3

Explanation:

2x + y = -2 ---> y = -2 - 2x

instead: 5x-2y = -23 ---> 5x - 2(-2 -2x) = -23 ----> 5x+4+4x= -23 ---> 9x= -27

---> x = -3

Answer 2

Explanation:

• SOLVED BY SUBSTITUTION !