X = -2y + 27
x - 3y = -18
How would I solve by substitution step by step?

Step-by-step explanation:

•Solve equation 1 for the variable x.

x = 3y - 27

•Plug this in for variable x in equation 2.

2×(3y-27) - 2y = 18

4y = 36

•Solve equation 2 for the variable y.

4y = 36

y = 9

•By now we know this much:

x = 3y-27

y = 9

•Use the y value to solve for x.

x = 3(9)-27 = 0

•Solution: {x,y} = {0,9}

step-by-step explanation: 2