hirondelle52

Verified answer

Bonjour,

1a)

3x

1b) 2(5+x) = 10+2x

2)

3x= 2x+10

3)

x= 9

3*9 = 27

2x+10 = 2*9+10 = 28

27 ≠ 28

faux!

x=10

30

20+10 = 30

Vrai

x = 11

33

32

33≠ 32

faux