9b-7=4b-12

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Solution for 9b-7=4b-12 equation:


Simplifying
9b + -7 = 4b + -12

Reorder the terms:
-7 + 9b = 4b + -12

Reorder the terms:
-7 + 9b = -12 + 4b

Solving
-7 + 9b = -12 + 4b

Solving for variable 'b'.

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

Add '-4b' to each side of the equation.
-7 + 9b + -4b = -12 + 4b + -4b

Combine like terms: 9b + -4b = 5b
-7 + 5b = -12 + 4b + -4b

Combine like terms: 4b + -4b = 0
-7 + 5b = -12 + 0
-7 + 5b = -12

Add '7' to each side of the equation.
-7 + 7 + 5b = -12 + 7

Combine like terms: -7 + 7 = 0
0 + 5b = -12 + 7
5b = -12 + 7

Combine like terms: -12 + 7 = -5
5b = -5

Divide each side by '5'.
b = -1

Simplifying
b = -1

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