Question

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Answer 1

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