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7x=1-3
Subtract 3 from both sides.
7x=-2
Subtract 3 from 1 to get -2.
x=\frac{-2}{7}
Divide both sides by 7.
x=-\frac{2}{7}
Fraction \frac{-2}{7} can be rewritten as -\frac{2}{7} by extracting the negative sign.