-4(1-6b)-4(1+7b)=20

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Solution for -4(1-6b)-4(1+7b)=20 equation: 


Simplifying
-4(1 + -6b) + -4(1 + 7b) = 20
(1 * -4 + -6b * -4) + -4(1 + 7b) = 20
(-4 + 24b) + -4(1 + 7b) = 20
-4 + 24b + (1 * -4 + 7b * -4) = 20
-4 + 24b + (-4 + -28b) = 20

Reorder the terms:
-4 + -4 + 24b + -28b = 20

Combine like terms: -4 + -4 = -8
-8 + 24b + -28b = 20

Combine like terms: 24b + -28b = -4b
-8 + -4b = 20

Solving
-8 + -4b = 20

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 + -4b = 20 + 8

Combine like terms: -8 + 8 = 0
0 + -4b = 20 + 8
-4b = 20 + 8

Combine like terms: 20 + 8 = 28
-4b = 28

Divide each side by '-4'.
b = -7

Simplifying
b = -7

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