Answer:
1.
3x-20=130
3x=130+20
3x=150
x=50
2.
8x-2=-9+7x
8x-7x=-9+2
x=-7
3.
x+6=33
x=33-6
x=27
those tasks are very simple, you should try to solve them on you're own first :)
Step-by-step explanation:
