5b-7(b-8)=40

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Solution for 5b-7(b-8)=40 equation:


Simplifying
5b + -7(b + -8) = 40

Reorder the terms:
5b + -7(-8 + b) = 40
5b + (-8 * -7 + b * -7) = 40
5b + (56 + -7b) = 40

Reorder the terms:
56 + 5b + -7b = 40

Combine like terms: 5b + -7b = -2b
56 + -2b = 40

Solving
56 + -2b = 40

Solving for variable 'b'.

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

Add '-56' to each side of the equation.
56 + -56 + -2b = 40 + -56

Combine like terms: 56 + -56 = 0
0 + -2b = 40 + -56
-2b = 40 + -56

Combine like terms: 40 + -56 = -16
-2b = -16

Divide each side by '-2'.
b = 8

Simplifying
b = 8

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