3a-99=72

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Solution for 3a-99=72 equation: 


Simplifying
3a + -99 = 72

Reorder the terms:
-99 + 3a = 72

Solving
-99 + 3a = 72

Solving for variable 'a'.

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

Add '99' to each side of the equation.
-99 + 99 + 3a = 72 + 99

Combine like terms: -99 + 99 = 0
0 + 3a = 72 + 99
3a = 72 + 99

Combine like terms: 72 + 99 = 171
3a = 171

Divide each side by '3'.
a = 57

Simplifying
a = 57

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