2X+1=X+21

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Solution for 2X+1=X+21 equation:


Simplifying
2X + 1 = X + 21

Reorder the terms:
1 + 2X = X + 21

Reorder the terms:
1 + 2X = 21 + X

Solving
1 + 2X = 21 + 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.
1 + 2X + -1X = 21 + X + -1X

Combine like terms: 2X + -1X = 1X
1 + 1X = 21 + X + -1X

Combine like terms: X + -1X = 0
1 + 1X = 21 + 0
1 + 1X = 21

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

Combine like terms: 1 + -1 = 0
0 + 1X = 21 + -1
1X = 21 + -1

Combine like terms: 21 + -1 = 20
1X = 20

Divide each side by '1'.
X = 20

Simplifying
X = 20

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