999-300=x

Solution for 999-300=x equation:

Simplifying
999 + -300 = x

Combine like terms: 999 + -300 = 699
699 = x

Solving
699 = 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.
699 + -1x = x + -1x

Combine like terms: x + -1x = 0
699 + -1x = 0

Add '-699' to each side of the equation.
699 + -699 + -1x = 0 + -699

Combine like terms: 699 + -699 = 0
0 + -1x = 0 + -699
-1x = 0 + -699

Combine like terms: 0 + -699 = -699
-1x = -699

Divide each side by '-1'.
x = 699

Simplifying
x = 699