3X+20=X+42

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Solution for 3X+20=X+42 equation:


Simplifying
3X + 20 = X + 42

Reorder the terms:
20 + 3X = X + 42

Reorder the terms:
20 + 3X = 42 + X

Solving
20 + 3X = 42 + 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.
20 + 3X + -1X = 42 + X + -1X

Combine like terms: 3X + -1X = 2X
20 + 2X = 42 + X + -1X

Combine like terms: X + -1X = 0
20 + 2X = 42 + 0
20 + 2X = 42

Add '-20' to each side of the equation.
20 + -20 + 2X = 42 + -20

Combine like terms: 20 + -20 = 0
0 + 2X = 42 + -20
2X = 42 + -20

Combine like terms: 42 + -20 = 22
2X = 22

Divide each side by '2'.
X = 11

Simplifying
X = 11

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