9=7b-12

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Solution for 9=7b-12 equation:


Simplifying
9 = 7b + -12

Reorder the terms:
9 = -12 + 7b

Solving
9 = -12 + 7b

Solving for variable 'b'.

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

Add '-7b' to each side of the equation.
9 + -7b = -12 + 7b + -7b

Combine like terms: 7b + -7b = 0
9 + -7b = -12 + 0
9 + -7b = -12

Add '-9' to each side of the equation.
9 + -9 + -7b = -12 + -9

Combine like terms: 9 + -9 = 0
0 + -7b = -12 + -9
-7b = -12 + -9

Combine like terms: -12 + -9 = -21
-7b = -21

Divide each side by '-7'.
b = 3

Simplifying
b = 3

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