20+2-X=7

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Solution for 20+2-X=7 equation: 


Simplifying
20 + 2 + -1X = 7

Combine like terms: 20 + 2 = 22
22 + -1X = 7

Solving
22 + -1X = 7

Solving for variable 'X'.

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

Add '-22' to each side of the equation.
22 + -22 + -1X = 7 + -22

Combine like terms: 22 + -22 = 0
0 + -1X = 7 + -22
-1X = 7 + -22

Combine like terms: 7 + -22 = -15
-1X = -15

Divide each side by '-1'.
X = 15

Simplifying
X = 15

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