-9=.5a

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Solution for -9=.5a equation:


Simplifying
-9 = 0.5a

Solving
-9 = 0.5a

Solving for variable 'a'.

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

Add '-0.5a' to each side of the equation.
-9 + -0.5a = 0.5a + -0.5a

Combine like terms: 0.5a + -0.5a = 0.0
-9 + -0.5a = 0.0

Add '9' to each side of the equation.
-9 + 9 + -0.5a = 0.0 + 9

Combine like terms: -9 + 9 = 0
0 + -0.5a = 0.0 + 9
-0.5a = 0.0 + 9

Combine like terms: 0.0 + 9 = 9
-0.5a = 9

Divide each side by '-0.5'.
a = -18

Simplifying
a = -18

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