5+(X-1)+X=12

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Solution for 5+(X-1)+X=12 equation:


Simplifying
5 + (X + -1) + X = 12

Reorder the terms:
5 + (-1 + X) + X = 12

Remove parenthesis around (-1 + X)
5 + -1 + X + X = 12

Combine like terms: 5 + -1 = 4
4 + X + X = 12

Combine like terms: X + X = 2X
4 + 2X = 12

Solving
4 + 2X = 12

Solving for variable 'X'.

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

Add '-4' to each side of the equation.
4 + -4 + 2X = 12 + -4

Combine like terms: 4 + -4 = 0
0 + 2X = 12 + -4
2X = 12 + -4

Combine like terms: 12 + -4 = 8
2X = 8

Divide each side by '2'.
X = 4

Simplifying
X = 4

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