18-a=2a

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Solution for 18-a=2a equation:


Simplifying
18 + -1a = 2a

Solving
18 + -1a = 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
18 + -1a + -2a = 2a + -2a

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

Combine like terms: 2a + -2a = 0
18 + -3a = 0

Add '-18' to each side of the equation.
18 + -18 + -3a = 0 + -18

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

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

Divide each side by '-3'.
a = 6

Simplifying
a = 6

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