Question

făceți acești exerciții dau coroana!!!!​

Answer 1

Răspuns:

a/(1/2)=b/(1/7)=k

a=2k

b=7k

2k+7k=270=>k=270:9=>k=30

a=2*30=>a=60

b=7*30=>b=210

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a/(1/3)=b/(1/5)=k

a=3k

b=5k

3k+5k=192=>k=192:8=>k=24

a=3*24=>a=72

b=5*24=>b=120

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(a+b)/2=27,5

a+b=27,5*2

a+b=55

a/(1/3)=b/91/8)=k

a=3k

b=8k

3k+8k=55=>k=55:11=>k=5

a=15

b=40