15.3-2.4(6-1)=3a

Solution for 15.3-2.4(6-1)=3a equation:

Simplifying
15.3 + -2.4(6 + -1) = 3a

Combine like terms: 6 + -1 = 5
15.3 + -2.4(5) = 3a

Multiply -2.4 * 5
15.3 + -12 = 3a

Combine like terms: 15.3 + -12 = 3.3
3.3 = 3a

Solving
3.3 = 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
3.3 + -3a = 3a + -3a

Combine like terms: 3a + -3a = 0
3.3 + -3a = 0

Add '-3.3' to each side of the equation.
3.3 + -3.3 + -3a = 0 + -3.3

Combine like terms: 3.3 + -3.3 = 0.0
0.0 + -3a = 0 + -3.3
-3a = 0 + -3.3

Combine like terms: 0 + -3.3 = -3.3
-3a = -3.3

Divide each side by '-3'.
a = 1.1

Simplifying
a = 1.1