3a-a=18+6

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Solution for 3a-a=18+6 equation: 


Simplifying
3a + -1a = 18 + 6

Combine like terms: 3a + -1a = 2a
2a = 18 + 6

Combine like terms: 18 + 6 = 24
2a = 24

Solving
2a = 24

Solving for variable 'a'.

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

Divide each side by '2'.
a = 12

Simplifying
a = 12

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