Question

va rog ex 12 va rogg​

Answer 1

fie a,b și c cele trei numere necunoscute

a+b+c=3560

a=60/100×b

c=30/100×a

c=30/100×60/100×b

60/100×b+b+30/100×60/100×b=3560

60b/100+b+3/10×6/10×b=3560

60b/100+b+18/100×b=3560

60b/100+b+18b/100=3560 (amplifica cu 100)

(Apoi împarte numitorul)

60b+100b+18b=35600

178b=356000

b=356000/178

b=2000

a=60/100×2000

a=12000/10

a=1200

c=30/100×1200

c=3600/10

c=360

VERIFICARE:2000+1200+360=3560

R:a=1200

b=2000

c=360

Answer 2

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