Question

determinati nr a si b stiind ca 4/a=11/b si a+b=60

Answer 1

a+b=60  ⇒a=60-b

4/a=11/b

4/(60-b)=11/b

4b=11(60-b)

4b=660-11b

4b+11b=660

15b=660

b=660:15

b=44

inlocuim pe b in ec: a=60-b

a=60-44

a=16

proba: 4/16=1/4 (simplificam cu 4)

11/44=1/4 (simplificam cu 11)