7a-18=-2a

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Solution for 7a-18=-2a equation:


Simplifying
7a + -18 = -2a

Reorder the terms:
-18 + 7a = -2a

Solving
-18 + 7a = -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 + 7a + 2a = -2a + 2a

Combine like terms: 7a + 2a = 9a
-18 + 9a = -2a + 2a

Combine like terms: -2a + 2a = 0
-18 + 9a = 0

Add '18' to each side of the equation.
-18 + 18 + 9a = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 9a = 0 + 18
9a = 0 + 18

Combine like terms: 0 + 18 = 18
9a = 18

Divide each side by '9'.
a = 2

Simplifying
a = 2

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