0.4x-(1+.15x)=3

Solution for 0.4x-(1+.15x)=3 equation:

Simplifying
0.4x + -1(1 + 0.15x) = 3
0.4x + (1 * -1 + 0.15x * -1) = 3
0.4x + (-1 + -0.15x) = 3

Reorder the terms:
-1 + 0.4x + -0.15x = 3

Combine like terms: 0.4x + -0.15x = 0.25x
-1 + 0.25x = 3

Solving
-1 + 0.25x = 3

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 0.25x = 3 + 1

Combine like terms: -1 + 1 = 0
0 + 0.25x = 3 + 1
0.25x = 3 + 1

Combine like terms: 3 + 1 = 4
0.25x = 4

Divide each side by '0.25'.
x = 16

Simplifying
x = 16