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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