25=(12-x)+(5-x)+x+4

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Solution for 25=(12-x)+(5-x)+x+4 equation:


Simplifying
25 = (12 + -1x) + (5 + -1x) + x + 4

Remove parenthesis around (12 + -1x)
25 = 12 + -1x + (5 + -1x) + x + 4

Remove parenthesis around (5 + -1x)
25 = 12 + -1x + 5 + -1x + x + 4

Reorder the terms:
25 = 12 + 5 + 4 + -1x + -1x + x

Combine like terms: 12 + 5 = 17
25 = 17 + 4 + -1x + -1x + x

Combine like terms: 17 + 4 = 21
25 = 21 + -1x + -1x + x

Combine like terms: -1x + -1x = -2x
25 = 21 + -2x + x

Combine like terms: -2x + x = -1x
25 = 21 + -1x

Solving
25 = 21 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
25 + x = 21 + -1x + x

Combine like terms: -1x + x = 0
25 + x = 21 + 0
25 + x = 21

Add '-25' to each side of the equation.
25 + -25 + x = 21 + -25

Combine like terms: 25 + -25 = 0
0 + x = 21 + -25
x = 21 + -25

Combine like terms: 21 + -25 = -4
x = -4

Simplifying
x = -4

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