-2(-4b-2)-7(b-3)=20

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Solution for -2(-4b-2)-7(b-3)=20 equation:


Simplifying
-2(-4b + -2) + -7(b + -3) = 20

Reorder the terms:
-2(-2 + -4b) + -7(b + -3) = 20
(-2 * -2 + -4b * -2) + -7(b + -3) = 20
(4 + 8b) + -7(b + -3) = 20

Reorder the terms:
4 + 8b + -7(-3 + b) = 20
4 + 8b + (-3 * -7 + b * -7) = 20
4 + 8b + (21 + -7b) = 20

Reorder the terms:
4 + 21 + 8b + -7b = 20

Combine like terms: 4 + 21 = 25
25 + 8b + -7b = 20

Combine like terms: 8b + -7b = 1b
25 + 1b = 20

Solving
25 + 1b = 20

Solving for variable 'b'.

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

Add '-25' to each side of the equation.
25 + -25 + 1b = 20 + -25

Combine like terms: 25 + -25 = 0
0 + 1b = 20 + -25
1b = 20 + -25

Combine like terms: 20 + -25 = -5
1b = -5

Divide each side by '1'.
b = -5

Simplifying
b = -5

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