-15b+21=-729

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Solution for -15b+21=-729 equation: 



-15b+21=-729

We move all terms to the left:

-15b+21-(-729)=0

We add all the numbers together, and all the variables

-15b+750=0

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

-15b=-750

b=-750/-15

b=+50

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