-109=4(13b-12)+9b

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Solution for -109=4(13b-12)+9b equation:


Simplifying
-109 = 4(13b + -12) + 9b

Reorder the terms:
-109 = 4(-12 + 13b) + 9b
-109 = (-12 * 4 + 13b * 4) + 9b
-109 = (-48 + 52b) + 9b

Combine like terms: 52b + 9b = 61b
-109 = -48 + 61b

Solving
-109 = -48 + 61b

Solving for variable 'b'.

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

Add '-61b' to each side of the equation.
-109 + -61b = -48 + 61b + -61b

Combine like terms: 61b + -61b = 0
-109 + -61b = -48 + 0
-109 + -61b = -48

Add '109' to each side of the equation.
-109 + 109 + -61b = -48 + 109

Combine like terms: -109 + 109 = 0
0 + -61b = -48 + 109
-61b = -48 + 109

Combine like terms: -48 + 109 = 61
-61b = 61

Divide each side by '-61'.
b = -1

Simplifying
b = -1

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