142=4b+7(1-7b)

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Solution for 142=4b+7(1-7b) equation: 



142=4b+7(1-7b)

We move all terms to the left:

142-(4b+7(1-7b))=0

We add all the numbers together, and all the variables

-(4b+7(-7b+1))+142=0



We calculate terms in parentheses: -(4b+7(-7b+1)), so:

4b+7(-7b+1)

We multiply parentheses

4b-49b+7

We add all the numbers together, and all the variables

-45b+7

Back to the equation:

-(-45b+7)



We get rid of parentheses

45b-7+142=0

We add all the numbers together, and all the variables

45b+135=0

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

45b=-135

b=-135/45

b=-3

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