Răspuns :

Răspuns:

Explicație pas cu pas:

(a + b + c) : 3 = 15/7

a + b + c = 3*15/7 = 45/7

(a + b) : 2 = 17/7

a + b = 2*17/7 = 34/7

c = 45/7 - 34/7 = 11/7

Teodoraaa52784id

(a+b+c):3= 15/7

(a+b):2= 17/7

_____________

c=?

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(a+b+c): 3/1= 15/7

a+b+c= 15×3/ 1×7

= 45/7= 6,43

(a+b): 2/1= 17/7

a+b= 2×17/1×7

= 34/7= 4,9

a+b+c=6,43, a+b=4,9

4,9+c=6,43

c=6,43-4,9

c=1,53

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