(13b-8)-3(4b+4)=-7

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Solution for (13b-8)-3(4b+4)=-7 equation:


Simplifying
(13b + -8) + -3(4b + 4) = -7

Reorder the terms:
(-8 + 13b) + -3(4b + 4) = -7

Remove parenthesis around (-8 + 13b)
-8 + 13b + -3(4b + 4) = -7

Reorder the terms:
-8 + 13b + -3(4 + 4b) = -7
-8 + 13b + (4 * -3 + 4b * -3) = -7
-8 + 13b + (-12 + -12b) = -7

Reorder the terms:
-8 + -12 + 13b + -12b = -7

Combine like terms: -8 + -12 = -20
-20 + 13b + -12b = -7

Combine like terms: 13b + -12b = 1b
-20 + 1b = -7

Solving
-20 + 1b = -7

Solving for variable 'b'.

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

Add '20' to each side of the equation.
-20 + 20 + 1b = -7 + 20

Combine like terms: -20 + 20 = 0
0 + 1b = -7 + 20
1b = -7 + 20

Combine like terms: -7 + 20 = 13
1b = 13

Divide each side by '1'.
b = 13

Simplifying
b = 13

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