X+(X+20)=57

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Solution for X+(X+20)=57 equation:


Simplifying
X + (X + 20) = 57

Reorder the terms:
X + (20 + X) = 57

Remove parenthesis around (20 + X)
X + 20 + X = 57

Reorder the terms:
20 + X + X = 57

Combine like terms: X + X = 2X
20 + 2X = 57

Solving
20 + 2X = 57

Solving for variable 'X'.

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

Add '-20' to each side of the equation.
20 + -20 + 2X = 57 + -20

Combine like terms: 20 + -20 = 0
0 + 2X = 57 + -20
2X = 57 + -20

Combine like terms: 57 + -20 = 37
2X = 37

Divide each side by '2'.
X = 18.5

Simplifying
X = 18.5

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