20x=42-x

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Solution for 20x=42-x equation: 


Simplifying
20x = 42 + -1x

Solving
20x = 42 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
20x + x = 42 + -1x + x

Combine like terms: 20x + x = 21x
21x = 42 + -1x + x

Combine like terms: -1x + x = 0
21x = 42 + 0
21x = 42

Divide each side by '21'.
x = 2

Simplifying
x = 2

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