12=5+x+(x-1)

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


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

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

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

Reorder the terms:
12 = 5 + -1 + x + x

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

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

Solving
12 = 4 + 2x

Solving for variable 'x'.

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

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

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

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

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

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

Divide each side by '-2'.
x = 4

Simplifying
x = 4

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