0.20(a-15)=27

Solution for 0.20(a-15)=27 equation:

Simplifying
0.20(a + -15) = 27

Reorder the terms:
0.20(-15 + a) = 27
(-15 * 0.20 + a * 0.20) = 27
(-3 + 0.20a) = 27

Solving
-3 + 0.20a = 27

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 + 0.20a = 27 + 3

Combine like terms: -3 + 3 = 0
0 + 0.20a = 27 + 3
0.20a = 27 + 3

Combine like terms: 27 + 3 = 30
0.20a = 30

Divide each side by '0.20'.
a = 150

Simplifying
a = 150