A system of equations is given below
Y = -2x + 1
Which of the following steps could be used to solve by substitution?
6(-2x + 1) + 2y = 22
6(Y = -2x + 1)
6x + 2(-2x + 1) = 22
-2x + 1 = 6x + 2y
The step that could be used to solve by substitution is:
6x + 2(-2x + 1) = 22