Question

Aflati nr {a,b,c} i.p {2,3,4} si a+b-c=10
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Answer 1

Răspuns:

a=60/7

b=40/7

c=30/7

Explicație pas cu pas:

{a, b, c} ip {2, 3, 4} inseamna: 2a=3b=4c=k.

Deci a=k/2, b=k/3, c=k/4

Dar a+b-c=10.

k/2+k/3-k/4=10

k/4+k/3=10

7k/12=10

k=120/7.

Deci a=k/2=60/7

b=k/3=40/7

c=k/4=30/7