1.5-0.25(a+4)=3

Solution for 1.5-0.25(a+4)=3 equation:

Simplifying
1.5 + -0.25(a + 4) = 3

Reorder the terms:
1.5 + -0.25(4 + a) = 3
1.5 + (4 * -0.25 + a * -0.25) = 3
1.5 + (-1 + -0.25a) = 3

Combine like terms: 1.5 + -1 = 0.5
0.5 + -0.25a = 3

Solving
0.5 + -0.25a = 3

Solving for variable 'a'.

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

Add '-0.5' to each side of the equation.
0.5 + -0.5 + -0.25a = 3 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + -0.25a = 3 + -0.5
-0.25a = 3 + -0.5

Combine like terms: 3 + -0.5 = 2.5
-0.25a = 2.5

Divide each side by '-0.25'.
a = -10

Simplifying
a = -10