20-x=17

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Solution for 20-x=17 equation: 


Simplifying
20 + -1x = 17

Solving
20 + -1x = 17

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + -1x = 17 + -20

Combine like terms: 20 + -20 = 0
0 + -1x = 17 + -20
-1x = 17 + -20

Combine like terms: 17 + -20 = -3
-1x = -3

Divide each side by '-1'.
x = 3

Simplifying
x = 3

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