18=-8a-a

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Solution for 18=-8a-a equation:


Simplifying
18 = -8a + -1a

Combine like terms: -8a + -1a = -9a
18 = -9a

Solving
18 = -9a

Solving for variable 'a'.

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

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

Combine like terms: -9a + 9a = 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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