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21.3x=1-1.2
Subtract 1.2 from both sides.
21.3x=-0.2
Subtract 1.2 from 1 to get -0.2.
x=\frac{-0.2}{21.3}
Divide both sides by 21.3.
x=\frac{-2}{213}
Expand \frac{-0.2}{21.3} by multiplying both numerator and the denominator by 10.
x=-\frac{2}{213}
Fraction \frac{-2}{213} can be rewritten as -\frac{2}{213} by extracting the negative sign.