=12a+7-3(-9-4a)

Solution for =12a+7-3(-9-4a) equation:

Simplifying
0 = 12a + 7 + -3(-9 + -4a)
0 = 12a + 7 + (-9 * -3 + -4a * -3)
0 = 12a + 7 + (27 + 12a)

Reorder the terms:
0 = 7 + 27 + 12a + 12a

Combine like terms: 7 + 27 = 34
0 = 34 + 12a + 12a

Combine like terms: 12a + 12a = 24a
0 = 34 + 24a

Solving
0 = 34 + 24a

Solving for variable 'a'.

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

Add '-24a' to each side of the equation.
0 + -24a = 34 + 24a + -24a
Remove the zero:
-24a = 34 + 24a + -24a

Combine like terms: 24a + -24a = 0
-24a = 34 + 0
-24a = 34

Divide each side by '-24'.
a = -1.416666667

Simplifying
a = -1.416666667