-78=-7b+5(-6-b)

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Solution for -78=-7b+5(-6-b) equation: 



-78=-7b+5(-6-b)

We move all terms to the left:

-78-(-7b+5(-6-b))=0

We add all the numbers together, and all the variables

-(-7b+5(-1b-6))-78=0



We calculate terms in parentheses: -(-7b+5(-1b-6)), so:

-7b+5(-1b-6)

We multiply parentheses

-7b-5b-30

We add all the numbers together, and all the variables

-12b-30

Back to the equation:

-(-12b-30)



We get rid of parentheses

12b+30-78=0

We add all the numbers together, and all the variables

12b-48=0

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

12b=48

b=48/12

b=4

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