Răspunsuri

2014-11-15T19:12:59+02:00
9x-11<sau =2r+10
9x-11-10<sau=2r
9x-21<sau=2r
x=9,81-21<sau=120
x=8,72-21<sau=102
.................
x=5,45-21<sau=48
x=4,36-21<sau=30
x=3,27-21<sau=12
x=2,18-21<sau=-6