.5(3a-12)=-4.5

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Solution for .5(3a-12)=-4.5 equation:


Simplifying
0.5(3a + -12) = -4.5

Reorder the terms:
0.5(-12 + 3a) = -4.5
(-12 * 0.5 + 3a * 0.5) = -4.5
(-6 + 1.5a) = -4.5

Solving
-6 + 1.5a = -4.5

Solving for variable 'a'.

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

Add '6' to each side of the equation.
-6 + 6 + 1.5a = -4.5 + 6

Combine like terms: -6 + 6 = 0
0 + 1.5a = -4.5 + 6
1.5a = -4.5 + 6

Combine like terms: -4.5 + 6 = 1.5
1.5a = 1.5

Divide each side by '1.5'.
a = 1

Simplifying
a = 1

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