15+7a=99

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Solution for 15+7a=99 equation: 


Simplifying
15 + 7a = 99

Solving
15 + 7a = 99

Solving for variable 'a'.

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

Add '-15' to each side of the equation.
15 + -15 + 7a = 99 + -15

Combine like terms: 15 + -15 = 0
0 + 7a = 99 + -15
7a = 99 + -15

Combine like terms: 99 + -15 = 84
7a = 84

Divide each side by '7'.
a = 12

Simplifying
a = 12

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