Răspunsuri

2014-11-07T10:23:11+02:00
1)2x+8<sau egal 20
2x<sau egal 20-8
2x< sau egal 12
x<sau egal cu 12:2
x<sau egal 6
x=0,1,2,3,4,5,6

2)7x+3=x+28
7x+3-x=28
6x+3=28
6x=28-3
6x=25
x=25:6
x=4,1666666667

6 4 6