3(3+4a)+3=60

Solution for 3(3+4a)+3=60 equation:

Simplifying
3(3 + 4a) + 3 = 60
(3 * 3 + 4a * 3) + 3 = 60
(9 + 12a) + 3 = 60

Reorder the terms:
9 + 3 + 12a = 60

Combine like terms: 9 + 3 = 12
12 + 12a = 60

Solving
12 + 12a = 60

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + 12a = 60 + -12

Combine like terms: 12 + -12 = 0
0 + 12a = 60 + -12
12a = 60 + -12

Combine like terms: 60 + -12 = 48
12a = 48

Divide each side by '12'.
a = 4

Simplifying
a = 4