0.42=y-(y*0.12)

Solution for 0.42=y-(y*0.12) equation:

Simplifying
0.42 = y + -1(y * 0.12)

Reorder the terms for easier multiplication:
0.42 = y + -1(0.12y)

Remove parenthesis around (0.12y)
0.42 = y + -1 * 0.12y

Multiply -1 * 0.12
0.42 = y + -0.12y

Combine like terms: y + -0.12y = 0.88y
0.42 = 0.88y

Solving
0.42 = 0.88y

Solving for variable 'y'.

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

Add '-0.88y' to each side of the equation.
0.42 + -0.88y = 0.88y + -0.88y

Combine like terms: 0.88y + -0.88y = 0.00
0.42 + -0.88y = 0.00

Add '-0.42' to each side of the equation.
0.42 + -0.42 + -0.88y = 0.00 + -0.42

Combine like terms: 0.42 + -0.42 = 0.00
0.00 + -0.88y = 0.00 + -0.42
-0.88y = 0.00 + -0.42

Combine like terms: 0.00 + -0.42 = -0.42
-0.88y = -0.42

Divide each side by '-0.88'.
y = 0.4772727273

Simplifying
y = 0.4772727273