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3x+5-x=0
Subtract x from both sides.
2x+5=0
Combine 3x and -x to get 2x.
2x=-5
Subtract 5 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-5}{2}
Divide both sides by 2.
x=-\frac{5}{2}
Fraction \frac{-5}{2} can be rewritten as -\frac{5}{2} by extracting the negative sign.