12b-9+2b-b=87

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Solution for 12b-9+2b-b=87 equation:


Simplifying
12b + -9 + 2b + -1b = 87

Reorder the terms:
-9 + 12b + 2b + -1b = 87

Combine like terms: 12b + 2b = 14b
-9 + 14b + -1b = 87

Combine like terms: 14b + -1b = 13b
-9 + 13b = 87

Solving
-9 + 13b = 87

Solving for variable 'b'.

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

Add '9' to each side of the equation.
-9 + 9 + 13b = 87 + 9

Combine like terms: -9 + 9 = 0
0 + 13b = 87 + 9
13b = 87 + 9

Combine like terms: 87 + 9 = 96
13b = 96

Divide each side by '13'.
b = 7.384615385

Simplifying
b = 7.384615385

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