12=-.9a

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Solution for 12=-.9a equation:


Simplifying
12 = -0.9a

Solving
12 = -0.9a

Solving for variable 'a'.

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

Add '0.9a' to each side of the equation.
12 + 0.9a = -0.9a + 0.9a

Combine like terms: -0.9a + 0.9a = 0.0
12 + 0.9a = 0.0

Add '-12' to each side of the equation.
12 + -12 + 0.9a = 0.0 + -12

Combine like terms: 12 + -12 = 0
0 + 0.9a = 0.0 + -12
0.9a = 0.0 + -12

Combine like terms: 0.0 + -12 = -12
0.9a = -12

Divide each side by '0.9'.
a = -13.33333333

Simplifying
a = -13.33333333

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