Răspunsuri

2014-05-10T11:44:06+03:00
7a=7*2=14
2b=2*5=10
4a=4*2=8
3b=3*5=15
  7a-2b=14-10=4
  4a+3b=8+15=23
7a-2b/4a+3b=4/23
7 3 7