121=8(4-3b)-7

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Solution for 121=8(4-3b)-7 equation: 



121=8(4-3b)-7

We move all terms to the left:

121-(8(4-3b)-7)=0

We add all the numbers together, and all the variables

-(8(-3b+4)-7)+121=0



We calculate terms in parentheses: -(8(-3b+4)-7), so:

8(-3b+4)-7

We multiply parentheses

-24b+32-7

We add all the numbers together, and all the variables

-24b+25

Back to the equation:

-(-24b+25)



We get rid of parentheses

24b-25+121=0

We add all the numbers together, and all the variables

24b+96=0

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

24b=-96

b=-96/24

b=-4

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