100.39=28.90+49.99+2x

Solution for 100.39=28.90+49.99+2x equation:

Simplifying
100.39 = 28.90 + 49.99 + 2x

Combine like terms: 28.90 + 49.99 = 78.89
100.39 = 78.89 + 2x

Solving
100.39 = 78.89 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
100.39 + -2x = 78.89 + 2x + -2x

Combine like terms: 2x + -2x = 0
100.39 + -2x = 78.89 + 0
100.39 + -2x = 78.89

Add '-100.39' to each side of the equation.
100.39 + -100.39 + -2x = 78.89 + -100.39

Combine like terms: 100.39 + -100.39 = 0.00
0.00 + -2x = 78.89 + -100.39
-2x = 78.89 + -100.39

Combine like terms: 78.89 + -100.39 = -21.5
-2x = -21.5

Divide each side by '-2'.
x = 10.75

Simplifying
x = 10.75