9a-18=3a+15

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Solution for 9a-18=3a+15 equation:


Simplifying
9a + -18 = 3a + 15

Reorder the terms:
-18 + 9a = 3a + 15

Reorder the terms:
-18 + 9a = 15 + 3a

Solving
-18 + 9a = 15 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
-18 + 9a + -3a = 15 + 3a + -3a

Combine like terms: 9a + -3a = 6a
-18 + 6a = 15 + 3a + -3a

Combine like terms: 3a + -3a = 0
-18 + 6a = 15 + 0
-18 + 6a = 15

Add '18' to each side of the equation.
-18 + 18 + 6a = 15 + 18

Combine like terms: -18 + 18 = 0
0 + 6a = 15 + 18
6a = 15 + 18

Combine like terms: 15 + 18 = 33
6a = 33

Divide each side by '6'.
a = 5.5

Simplifying
a = 5.5

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