157=4(8+7)-3b

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Solution for 157=4(8+7)-3b equation: 



157=4(8+7)-3b

We move all terms to the left:

157-(4(8+7)-3b)=0

We add all the numbers together, and all the variables

-(415-3b)+157=0

We get rid of parentheses

3b-415+157=0

We add all the numbers together, and all the variables

3b-258=0

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

3b=258

b=258/3

b=86

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