3(a+1.5)=-1.5

Solution for 3(a+1.5)=-1.5 equation:

Simplifying
3(a + 1.5) = -1.5

Reorder the terms:
3(1.5 + a) = -1.5
(1.5 * 3 + a * 3) = -1.5
(4.5 + 3a) = -1.5

Solving
4.5 + 3a = -1.5

Solving for variable 'a'.

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

Add '-4.5' to each side of the equation.
4.5 + -4.5 + 3a = -1.5 + -4.5

Combine like terms: 4.5 + -4.5 = 0.0
0.0 + 3a = -1.5 + -4.5
3a = -1.5 + -4.5

Combine like terms: -1.5 + -4.5 = -6
3a = -6

Divide each side by '3'.
a = -2

Simplifying
a = -2