-8(1-7b)=-400

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Solution for -8(1-7b)=-400 equation: 


Simplifying
-8(1 + -7b) = -400
(1 * -8 + -7b * -8) = -400
(-8 + 56b) = -400

Solving
-8 + 56b = -400

Solving for variable 'b'.

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

Add '8' to each side of the equation.
-8 + 8 + 56b = -400 + 8

Combine like terms: -8 + 8 = 0
0 + 56b = -400 + 8
56b = -400 + 8

Combine like terms: -400 + 8 = -392
56b = -392

Divide each side by '56'.
b = -7

Simplifying
b = -7

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