3x+5-x=7

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Solution for 3x+5-x=7 equation: 


Simplifying
3x + 5 + -1x = 7

Reorder the terms:
5 + 3x + -1x = 7

Combine like terms: 3x + -1x = 2x
5 + 2x = 7

Solving
5 + 2x = 7

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + 2x = 7 + -5

Combine like terms: 5 + -5 = 0
0 + 2x = 7 + -5
2x = 7 + -5

Combine like terms: 7 + -5 = 2
2x = 2

Divide each side by '2'.
x = 1

Simplifying
x = 1

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