x+2(42-x)=57

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Solution for x+2(42-x)=57 equation:


Simplifying
x + 2(42 + -1x) = 57
x + (42 * 2 + -1x * 2) = 57
x + (84 + -2x) = 57

Reorder the terms:
84 + x + -2x = 57

Combine like terms: x + -2x = -1x
84 + -1x = 57

Solving
84 + -1x = 57

Solving for variable 'x'.

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

Add '-84' to each side of the equation.
84 + -84 + -1x = 57 + -84

Combine like terms: 84 + -84 = 0
0 + -1x = 57 + -84
-1x = 57 + -84

Combine like terms: 57 + -84 = -27
-1x = -27

Divide each side by '-1'.
x = 27

Simplifying
x = 27

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