The notebook

The notebook cost 10.50 euros after rising by 40%. How much would it cost if it increased in price by only 20% instead of 40%?

Correct answer:

x =  9 Eur

Step-by-step explanation:

k1=100%+40%=1+10040=1.4 k2=100%+20%=1+10020=1.2  k1 c=10.50 1.4 c=10.50  1.4c=10.5  c=1.410.5=7.5  c=215=7.5  x=k2 c=1.2 7.5=9 Eur



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