-2(3-6a)+4a=90

Solution for -2(3-6a)+4a=90 equation:

Simplifying
-2(3 + -6a) + 4a = 90
(3 * -2 + -6a * -2) + 4a = 90
(-6 + 12a) + 4a = 90

Combine like terms: 12a + 4a = 16a
-6 + 16a = 90

Solving
-6 + 16a = 90

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 + 16a = 90 + 6

Combine like terms: -6 + 6 = 0
0 + 16a = 90 + 6
16a = 90 + 6

Combine like terms: 90 + 6 = 96
16a = 96

Divide each side by '16'.
a = 6

Simplifying
a = 6