3.2a+5.8a+6=3+12

Solution for 3.2a+5.8a+6=3+12 equation:

Simplifying
3.2a + 5.8a + 6 = 3 + 12

Reorder the terms:
6 + 3.2a + 5.8a = 3 + 12

Combine like terms: 3.2a + 5.8a = 9a
6 + 9a = 3 + 12

Combine like terms: 3 + 12 = 15
6 + 9a = 15

Solving
6 + 9a = 15

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 + 9a = 15 + -6

Combine like terms: 6 + -6 = 0
0 + 9a = 15 + -6
9a = 15 + -6

Combine like terms: 15 + -6 = 9
9a = 9

Divide each side by '9'.
a = 1

Simplifying
a = 1