15-x=20

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Solution for 15-x=20 equation: 


Simplifying
15 + -1x = 20

Solving
15 + -1x = 20

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + -1x = 20 + -15

Combine like terms: 15 + -15 = 0
0 + -1x = 20 + -15
-1x = 20 + -15

Combine like terms: 20 + -15 = 5
-1x = 5

Divide each side by '-1'.
x = -5

Simplifying
x = -5

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