Răspunsuri

2014-09-29T10:19:09+03:00
x + y + z = 95;
x + y = 76;
76+z=95
z=19

x + y + z = 95; 
     y + z = 74 , 
x+74=95
x=21

21+y+19=95
40+y=95
y=55

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2014-09-29T10:26:31+03:00
X+y+z=95
x+y=76
y+z=74
x+74=95(am inlocuit,rezolvam ecuatia/necunoscuta)
x=95-74
x=21
76+z=95(am inlocuit..)
z=95-76
z=19
x+y+z=95
21+y+19=95
21+y=95-19
21+y=76
y=76-21
y=55
Proba: 21+19+55=95



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