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Răspuns:
2.
a) 2x-2=16
2x = 16+2
2x = 18
x= 18 : 2
x= 9
b) 2x-4=46
2x =46+4
2x =50
x=50:2
x= 25
c) 2x-6=20
2x =20+6
2x =26
x =26:2
x =13
d) 3x-5=7
3x = 7+5
3x = 12
x = 12 : 3
x=4
e) 5x-11=19
5x =19+11
5x =30
x=30:5
x =6
f) x:6=2
x=6×2
x=12