-7(1-3b)=-112

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Solution for -7(1-3b)=-112 equation: 


Simplifying
-7(1 + -3b) = -112
(1 * -7 + -3b * -7) = -112
(-7 + 21b) = -112

Solving
-7 + 21b = -112

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '7' to each side of the equation.
-7 + 7 + 21b = -112 + 7

Combine like terms: -7 + 7 = 0
0 + 21b = -112 + 7
21b = -112 + 7

Combine like terms: -112 + 7 = -105
21b = -105

Divide each side by '21'.
b = -5

Simplifying
b = -5

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