4a+6+a-3+3a=75

Solution for 4a+6+a-3+3a=75 equation:

Simplifying
4a + 6 + a + -3 + 3a = 75

Reorder the terms:
6 + -3 + 4a + a + 3a = 75

Combine like terms: 6 + -3 = 3
3 + 4a + a + 3a = 75

Combine like terms: 4a + a = 5a
3 + 5a + 3a = 75

Combine like terms: 5a + 3a = 8a
3 + 8a = 75

Solving
3 + 8a = 75

Solving for variable 'a'.

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

Add '-3' to each side of the equation.
3 + -3 + 8a = 75 + -3

Combine like terms: 3 + -3 = 0
0 + 8a = 75 + -3
8a = 75 + -3

Combine like terms: 75 + -3 = 72
8a = 72

Divide each side by '8'.
a = 9

Simplifying
a = 9