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Calculati fiecare Z.

RepedeeeCalculati Fiecare Z class=

Răspuns :

Roberteladrianpb6zy7

(1) a+b+c=20

(2) a-b=c+2

(3) a+b-c=4


(1) a+b+c=20

(3) a+b-c=4

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2a+2b = 24 =>


a+b=12

(3) a+b-c=4 => a+b-4=c

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12-4=c => c = 8


a-b=8+2 => a-b=10


a-b=10

a+b=12

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2a=22 => a= 11

=> b = 1

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