-3(3-4a)=-45

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Solution for -3(3-4a)=-45 equation: 


Simplifying
-3(3 + -4a) = -45
(3 * -3 + -4a * -3) = -45
(-9 + 12a) = -45

Solving
-9 + 12a = -45

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + 9 + 12a = -45 + 9

Combine like terms: -9 + 9 = 0
0 + 12a = -45 + 9
12a = -45 + 9

Combine like terms: -45 + 9 = -36
12a = -36

Divide each side by '12'.
a = -3

Simplifying
a = -3

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