Răspunsuri

2014-09-23T09:50:09+03:00
3a+5b+2c=?
a+b=5,b+c=7
a=5-b,c=7-b
3(5-b)+5b+2(7-b)=15-3b+5b+14-2b=29
multumesc dar raspunsul in carte era 77 eu cred ca au gresit. asa imi da si mie 29 dar ma gandem ca gresesc
In carte mai dau sio raspunsuri gresite!
asa e mersi