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x=7
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x≔7
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x=\frac{1+20}{3}
Since \frac{1}{3} and \frac{20}{3} have the same denominator, add them by adding their numerators.
x=\frac{21}{3}
Add 1 and 20 to get 21.
x=7
Divide 21 by 3 to get 7.
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