15-9b=78

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Solution for 15-9b=78 equation: 


Simplifying
15 + -9b = 78

Solving
15 + -9b = 78

Solving for variable 'b'.

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

Add '-15' to each side of the equation.
15 + -15 + -9b = 78 + -15

Combine like terms: 15 + -15 = 0
0 + -9b = 78 + -15
-9b = 78 + -15

Combine like terms: 78 + -15 = 63
-9b = 63

Divide each side by '-9'.
b = -7

Simplifying
b = -7

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