x = \frac { 20 \cdot 42,50 } { 100 } =
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x=8,5
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x≔8,5
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x=\frac{850}{100}
Multiply 20 and 42,5 to get 850.
x=\frac{17}{2}
Reduce the fraction \frac{850}{100} to lowest terms by extracting and canceling out 50.
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