7-x=x-7

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Solution for 7-x=x-7 equation:


Simplifying
7 + -1x = x + -7

Reorder the terms:
7 + -1x = -7 + x

Solving
7 + -1x = -7 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
7 + -1x + -1x = -7 + x + -1x

Combine like terms: -1x + -1x = -2x
7 + -2x = -7 + x + -1x

Combine like terms: x + -1x = 0
7 + -2x = -7 + 0
7 + -2x = -7

Add '-7' to each side of the equation.
7 + -7 + -2x = -7 + -7

Combine like terms: 7 + -7 = 0
0 + -2x = -7 + -7
-2x = -7 + -7

Combine like terms: -7 + -7 = -14
-2x = -14

Divide each side by '-2'.
x = 7

Simplifying
x = 7

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