140=.8(x)

Solution for 140=.8(x) equation:

Simplifying
140 = 0.8(x)

Solving
140 = 0.8x

Solving for variable 'x'.

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

Add '-0.8x' to each side of the equation.
140 + -0.8x = 0.8x + -0.8x

Combine like terms: 0.8x + -0.8x = 0.0
140 + -0.8x = 0.0

Add '-140' to each side of the equation.
140 + -140 + -0.8x = 0.0 + -140

Combine like terms: 140 + -140 = 0
0 + -0.8x = 0.0 + -140
-0.8x = 0.0 + -140

Combine like terms: 0.0 + -140 = -140
-0.8x = -140

Divide each side by '-0.8'.
x = 175

Simplifying
x = 175