Use substitution to solve the system

2y - 8 = x

2x + 3y = - 2

x=2y-8

We use the substitution of x in the second equation

2 * (2y-8) + 3y = - 2

4y-16+3y=-2

7y-16 = - 2

7y = - 2 + 16

7y=14

y=14Ș7

y=2

so x = 2*2 - 8

x=4-8

x=-4

the solution is (x, y) = (-4, 2)