5b-(-15b)=20

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Solution for 5b-(-15b)=20 equation: 



5b-(-15b)=20

We move all terms to the left:

5b-(-15b)-(20)=0

We get rid of parentheses

5b+15b-20=0

We add all the numbers together, and all the variables

20b-20=0

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

20b=20

b=20/20

b=1

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