Question

va rog 7,12,15,18 dau coroana si 38 puncte

Answer 1

18/100*x=90⇒x=90*100/18=500
23/100*x=4600⇒x=4600*100/23=20000
12)  p/100*21,4=3,21⇒p=3,21*100/21,4=15
p/100*200=300⇒p=300/2=150
p/100*100=100⇒p=100
15)p/100*450=15⇒p=15*100/450=3,(3)p/100*60=220⇒p=220*100/60=36,(6)p/100*420=14⇒p=14*100/420=3,(3)