2x-21-x=4

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Solution for 2x-21-x=4 equation:


Simplifying
2x + -21 + -1x = 4

Reorder the terms:
-21 + 2x + -1x = 4

Combine like terms: 2x + -1x = 1x
-21 + 1x = 4

Solving
-21 + 1x = 4

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 1x = 4 + 21

Combine like terms: -21 + 21 = 0
0 + 1x = 4 + 21
1x = 4 + 21

Combine like terms: 4 + 21 = 25
1x = 25

Divide each side by '1'.
x = 25

Simplifying
x = 25

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