85-x=72

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Solution for 85-x=72 equation: 


Simplifying
85 + -1x = 72

Solving
85 + -1x = 72

Solving for variable 'x'.

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

Add '-85' to each side of the equation.
85 + -85 + -1x = 72 + -85

Combine like terms: 85 + -85 = 0
0 + -1x = 72 + -85
-1x = 72 + -85

Combine like terms: 72 + -85 = -13
-1x = -13

Divide each side by '-1'.
x = 13

Simplifying
x = 13

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