Question

How do you solve by Substitution `y = -x + 5` and `2x - 3y = -6`?

Answer 1

Substitute y from the 1st equation into the 2nd equation.
2x -3(-x + 5) = -6
2x +3x -15 = -6
5x = -6 + 15
5x = 9
x = 9/5 = 1.8
y = -1.8 + 5 = 3.2