309.29-89.99=x

Solution for 309.29-89.99=x equation:

Simplifying
309.29 + -89.99 = x

Combine like terms: 309.29 + -89.99 = 219.3
219.3 = x

Solving
219.3 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
219.3 + -1x = x + -1x

Combine like terms: x + -1x = 0
219.3 + -1x = 0

Add '-219.3' to each side of the equation.
219.3 + -219.3 + -1x = 0 + -219.3

Combine like terms: 219.3 + -219.3 = 0.0
0.0 + -1x = 0 + -219.3
-1x = 0 + -219.3

Combine like terms: 0 + -219.3 = -219.3
-1x = -219.3

Divide each side by '-1'.
x = 219.3

Simplifying
x = 219.3