x+(x-21)=27

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Solution for x+(x-21)=27 equation: 


Simplifying
x + (x + -21) = 27

Reorder the terms:
x + (-21 + x) = 27

Remove parenthesis around (-21 + x)
x + -21 + x = 27

Reorder the terms:
-21 + x + x = 27

Combine like terms: x + x = 2x
-21 + 2x = 27

Solving
-21 + 2x = 27

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 2x = 27 + 21

Combine like terms: -21 + 21 = 0
0 + 2x = 27 + 21
2x = 27 + 21

Combine like terms: 27 + 21 = 48
2x = 48

Divide each side by '2'.
x = 24

Simplifying
x = 24

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