400-x=313

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Solution for 400-x=313 equation:


Simplifying
400 + -1x = 313

Solving
400 + -1x = 313

Solving for variable 'x'.

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

Add '-400' to each side of the equation.
400 + -400 + -1x = 313 + -400

Combine like terms: 400 + -400 = 0
0 + -1x = 313 + -400
-1x = 313 + -400

Combine like terms: 313 + -400 = -87
-1x = -87

Divide each side by '-1'.
x = 87

Simplifying
x = 87

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