3(4a-1)-3=90

Solution for 3(4a-1)-3=90 equation:

Simplifying
3(4a + -1) + -3 = 90

Reorder the terms:
3(-1 + 4a) + -3 = 90
(-1 * 3 + 4a * 3) + -3 = 90
(-3 + 12a) + -3 = 90

Reorder the terms:
-3 + -3 + 12a = 90

Combine like terms: -3 + -3 = -6
-6 + 12a = 90

Solving
-6 + 12a = 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 + 12a = 90 + 6

Combine like terms: -6 + 6 = 0
0 + 12a = 90 + 6
12a = 90 + 6

Combine like terms: 90 + 6 = 96
12a = 96

Divide each side by '12'.
a = 8

Simplifying
a = 8