12=3-3*4a

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Solution for 12=3-3*4a equation:


Simplifying
12 = 3 + -3 * 4a

Multiply -3 * 4
12 = 3 + -12a

Solving
12 = 3 + -12a

Solving for variable 'a'.

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

Add '12a' to each side of the equation.
12 + 12a = 3 + -12a + 12a

Combine like terms: -12a + 12a = 0
12 + 12a = 3 + 0
12 + 12a = 3

Add '-12' to each side of the equation.
12 + -12 + 12a = 3 + -12

Combine like terms: 12 + -12 = 0
0 + 12a = 3 + -12
12a = 3 + -12

Combine like terms: 3 + -12 = -9
12a = -9

Divide each side by '12'.
a = -0.75

Simplifying
a = -0.75

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