2x+21=x+7

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Solution for 2x+21=x+7 equation:


Simplifying
2x + 21 = x + 7

Reorder the terms:
21 + 2x = x + 7

Reorder the terms:
21 + 2x = 7 + x

Solving
21 + 2x = 7 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
21 + 2x + -1x = 7 + x + -1x

Combine like terms: 2x + -1x = 1x
21 + 1x = 7 + x + -1x

Combine like terms: x + -1x = 0
21 + 1x = 7 + 0
21 + 1x = 7

Add '-21' to each side of the equation.
21 + -21 + 1x = 7 + -21

Combine like terms: 21 + -21 = 0
0 + 1x = 7 + -21
1x = 7 + -21

Combine like terms: 7 + -21 = -14
1x = -14

Divide each side by '1'.
x = -14

Simplifying
x = -14

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