-15b+21+5b=-18

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Solution for -15b+21+5b=-18 equation: 



-15b+21+5b=-18

We move all terms to the left:

-15b+21+5b-(-18)=0

We add all the numbers together, and all the variables

-10b+39=0

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

-10b=-39

b=-39/-10

b=3+9/10

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