15b-40=5b+120

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Solution for 15b-40=5b+120 equation: 



15b-40=5b+120

We move all terms to the left:

15b-40-(5b+120)=0

We get rid of parentheses

15b-5b-120-40=0

We add all the numbers together, and all the variables

10b-160=0

We move all terms containing b to the left, all other terms to the right

10b=160

b=160/10

b=16

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