20-x-3=15

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Solution for 20-x-3=15 equation:


Simplifying
20 + -1x + -3 = 15

Reorder the terms:
20 + -3 + -1x = 15

Combine like terms: 20 + -3 = 17
17 + -1x = 15

Solving
17 + -1x = 15

Solving for variable 'x'.

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

Add '-17' to each side of the equation.
17 + -17 + -1x = 15 + -17

Combine like terms: 17 + -17 = 0
0 + -1x = 15 + -17
-1x = 15 + -17

Combine like terms: 15 + -17 = -2
-1x = -2

Divide each side by '-1'.
x = 2

Simplifying
x = 2

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