720-x=40

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Solution for 720-x=40 equation: 


Simplifying
720 + -1x = 40

Solving
720 + -1x = 40

Solving for variable 'x'.

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

Add '-720' to each side of the equation.
720 + -720 + -1x = 40 + -720

Combine like terms: 720 + -720 = 0
0 + -1x = 40 + -720
-1x = 40 + -720

Combine like terms: 40 + -720 = -680
-1x = -680

Divide each side by '-1'.
x = 680

Simplifying
x = 680

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