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E si algebra si geometrie..

E Si Algebra Si Geometrie class=
E Si Algebra Si Geometrie class=

Răspuns :

2)   3x+22=91
3x=91-22
3x=69 |:3
x=23

3)
x
x+1
x+2
x+x+1+x+2=105
3x+3=105
3x=102 |:3
x=34
Nr. sunt:34,35,36

5)
x+1
x+3
x+5
x+1+x+3+x+5=1800
3x+9=1800
3x=1791 |:3
x=597  Nr. sunt:598,600,602


7) x+2
    x+4
    x+6
x+2+x+4+x+6=2406
3x+12=2406
3x=2394 |:3
x=798 Nr.sunt:800,802,804