Solving by subsitution

Question

y=4x+22

y=-4x-18

Answer 1

y = 4x + 22

y = -4x - 18

 

4x + 22 = -4x - 18           transitive property

8x + 22 = -18                  add 4x to both sides

8x = -40                          subtract 22 from both sides

x = -5                              divide both sides by 8