Answer:
29
Step-by-step explanation:
5x+35=180 cuz 3x+2x, and 15+20
the subtract 35 on both sides, so 5x = 145
x=29
lets check
3(29)+15 = 102
2(29)+20 = 78
102+78 = 180
so x = 29
3x+15+2x+20=180
Combine like terms
5x+35=180
Subtract 35 on both sides
5x=145
Divide by 5 on both sides
