20-x-1=4

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Solution for 20-x-1=4 equation:


Simplifying
20 + -1x + -1 = 4

Reorder the terms:
20 + -1 + -1x = 4

Combine like terms: 20 + -1 = 19
19 + -1x = 4

Solving
19 + -1x = 4

Solving for variable 'x'.

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

Add '-19' to each side of the equation.
19 + -19 + -1x = 4 + -19

Combine like terms: 19 + -19 = 0
0 + -1x = 4 + -19
-1x = 4 + -19

Combine like terms: 4 + -19 = -15
-1x = -15

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

Simplifying
x = 15

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