78.88=x-(x*.1)

Solution for 78.88=x-(x*.1) equation:

Simplifying
78.88 = x + -1(x * 0.1)

Reorder the terms for easier multiplication:
78.88 = x + -1(0.1x)

Remove parenthesis around (0.1x)
78.88 = x + -1 * 0.1x

Multiply -1 * 0.1
78.88 = x + -0.1x

Combine like terms: x + -0.1x = 0.9x
78.88 = 0.9x

Solving
78.88 = 0.9x

Solving for variable 'x'.

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

Add '-0.9x' to each side of the equation.
78.88 + -0.9x = 0.9x + -0.9x

Combine like terms: 0.9x + -0.9x = 0.0
78.88 + -0.9x = 0.0

Add '-78.88' to each side of the equation.
78.88 + -78.88 + -0.9x = 0.0 + -78.88

Combine like terms: 78.88 + -78.88 = 0.00
0.00 + -0.9x = 0.0 + -78.88
-0.9x = 0.0 + -78.88

Combine like terms: 0.0 + -78.88 = -78.88
-0.9x = -78.88

Divide each side by '-0.9'.
x = 87.64444444

Simplifying
x = 87.64444444