Answer:
x=16
Step-by-step explanation:
4x+30+5x=180
9x+30-30=180-30 (you want to get x to be by itself)
9x/9=150/9
x=16.667
4x + 30 = 5x
4x = 5x - 30
4x - 5x = - 30
x = 30