3a+9-18=36

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Solution for 3a+9-18=36 equation: 


Simplifying
3a + 9 + -18 = 36

Reorder the terms:
9 + -18 + 3a = 36

Combine like terms: 9 + -18 = -9
-9 + 3a = 36

Solving
-9 + 3a = 36

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + 9 + 3a = 36 + 9

Combine like terms: -9 + 9 = 0
0 + 3a = 36 + 9
3a = 36 + 9

Combine like terms: 36 + 9 = 45
3a = 45

Divide each side by '3'.
a = 15

Simplifying
a = 15

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