.80x+0.35(120)=0.40(79)

Solution for .80x+0.35(120)=0.40(79) equation:

Simplifying
0.80x + 0.35(120) = 0.40(79)

Multiply 0.35 * 120
0.80x + 42 = 0.40(79)

Reorder the terms:
42 + 0.80x = 0.40(79)

Multiply 0.40 * 79
42 + 0.80x = 31.6

Solving
42 + 0.80x = 31.6

Solving for variable 'x'.

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

Add '-42' to each side of the equation.
42 + -42 + 0.80x = 31.6 + -42

Combine like terms: 42 + -42 = 0
0 + 0.80x = 31.6 + -42
0.80x = 31.6 + -42

Combine like terms: 31.6 + -42 = -10.4
0.80x = -10.4

Divide each side by '0.80'.
x = -13

Simplifying
x = -13