900-x=300+x

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Solution for 900-x=300+x equation:


Simplifying
900 + -1x = 300 + x

Solving
900 + -1x = 300 + 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.
900 + -1x + -1x = 300 + x + -1x

Combine like terms: -1x + -1x = -2x
900 + -2x = 300 + x + -1x

Combine like terms: x + -1x = 0
900 + -2x = 300 + 0
900 + -2x = 300

Add '-900' to each side of the equation.
900 + -900 + -2x = 300 + -900

Combine like terms: 900 + -900 = 0
0 + -2x = 300 + -900
-2x = 300 + -900

Combine like terms: 300 + -900 = -600
-2x = -600

Divide each side by '-2'.
x = 300

Simplifying
x = 300

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