.80x+.80(90)=.40(94)

Solution for .80x+.80(90)=.40(94) equation:

Simplifying
0.80x + 0.80(90) = 0.40(94)

Multiply 0.80 * 90
0.80x + 72 = 0.40(94)

Reorder the terms:
72 + 0.80x = 0.40(94)

Multiply 0.40 * 94
72 + 0.80x = 37.6

Solving
72 + 0.80x = 37.6

Solving for variable 'x'.

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

Add '-72' to each side of the equation.
72 + -72 + 0.80x = 37.6 + -72

Combine like terms: 72 + -72 = 0
0 + 0.80x = 37.6 + -72
0.80x = 37.6 + -72

Combine like terms: 37.6 + -72 = -34.4
0.80x = -34.4

Divide each side by '0.80'.
x = -43

Simplifying
x = -43