3x+7=7-x

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Solution for 3x+7=7-x equation:


Simplifying
3x + 7 = 7 + -1x

Reorder the terms:
7 + 3x = 7 + -1x

Add '-7' to each side of the equation.
7 + -7 + 3x = 7 + -7 + -1x

Combine like terms: 7 + -7 = 0
0 + 3x = 7 + -7 + -1x
3x = 7 + -7 + -1x

Combine like terms: 7 + -7 = 0
3x = 0 + -1x
3x = -1x

Solving
3x = -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.
3x + x = -1x + x

Combine like terms: 3x + x = 4x
4x = -1x + x

Combine like terms: -1x + x = 0
4x = 0

Divide each side by '4'.
x = 0

Simplifying
x = 0

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