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AJUTORRRRRRRRRRRRRRRRRRRRRRRRRRRRRR!! CU REZOLVARE. Dacă x+y=17,​

AJUTORRRRRRRRRRRRRRRRRRRRRRRRRRRRRR CU REZOLVARE Dacă Xy17 class=

Răspuns :

Euu12345678ask

Adunam cele trei realtii si obținem

2x+2y+2z=17+25+26

2(x+y+z)=68

Impartim totul la 2

x+y+z=34

Deoarece x+z=26 rezulta ca

y=34-26

y=8

Deoarece x+y=17 rezulta ca

z=34-17

z=17

La relatia x+y+z=34 vom aduna y+2z

x+y+z+y+2z=34+8+2×17

x+2y+3z=42+34

x+2y+3z=76

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