12b-16+5b+13+4b+15=180

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Solution for 12b-16+5b+13+4b+15=180 equation: 


Simplifying
12b + -16 + 5b + 13 + 4b + 15 = 180

Reorder the terms:
-16 + 13 + 15 + 12b + 5b + 4b = 180

Combine like terms: -16 + 13 = -3
-3 + 15 + 12b + 5b + 4b = 180

Combine like terms: -3 + 15 = 12
12 + 12b + 5b + 4b = 180

Combine like terms: 12b + 5b = 17b
12 + 17b + 4b = 180

Combine like terms: 17b + 4b = 21b
12 + 21b = 180

Solving
12 + 21b = 180

Solving for variable 'b'.

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

Add '-12' to each side of the equation.
12 + -12 + 21b = 180 + -12

Combine like terms: 12 + -12 = 0
0 + 21b = 180 + -12
21b = 180 + -12

Combine like terms: 180 + -12 = 168
21b = 168

Divide each side by '21'.
b = 8

Simplifying
b = 8

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