9b+4=12b-8

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Solution for 9b+4=12b-8 equation:


Simplifying
9b + 4 = 12b + -8

Reorder the terms:
4 + 9b = 12b + -8

Reorder the terms:
4 + 9b = -8 + 12b

Solving
4 + 9b = -8 + 12b

Solving for variable 'b'.

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

Add '-12b' to each side of the equation.
4 + 9b + -12b = -8 + 12b + -12b

Combine like terms: 9b + -12b = -3b
4 + -3b = -8 + 12b + -12b

Combine like terms: 12b + -12b = 0
4 + -3b = -8 + 0
4 + -3b = -8

Add '-4' to each side of the equation.
4 + -4 + -3b = -8 + -4

Combine like terms: 4 + -4 = 0
0 + -3b = -8 + -4
-3b = -8 + -4

Combine like terms: -8 + -4 = -12
-3b = -12

Divide each side by '-3'.
b = 4

Simplifying
b = 4

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