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Dresses that initially cost 100 € after a double discount of 10% subsequently increased in price by 20%. How much did they cost?

Correct answer:

x =  97.2 Eur

Step-by-step explanation:

a=100 Eur r1=100%10%=110010=0.9 r2=100%+20%=1+10020=1.2  a2=r1 a=0.9 100=90 Eur a3=r1 a2=0.9 90=81 Eur  x=r2 a3=1.2 81=97.2 Eur

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