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Sagot :

a)7x=28

x = 28/7

x= 4

 

b)7+x=28

x = 28-7

x=21

 

c) -7x=-28

x = -28/-7

x= 28/7

x=4

 

d)7x=-28

x = -28/7

 

e)7-x=28

-x = 28-7

-x = 21

x = -21

 

f)x-7=-28

x = -28+7

x = -21

 

g)7+x=-28

h)x-7=28

i)-7x=28

j)7-x=-28

PYLOOW

7x=28

x=28/7

x=4

 

7+x=28

x=-7+28

x=21

 

-7x=-28

-x=-28/7

-x=4

x=4

 

7x=-28

x=-28/7

x=-4

 

7-x=28

-x=-7+28

-x=21

x=-21

 

x-7=-28

x=7-28

x=-21

 

7+x=-28

x=-7-28

x=35

 

x-7=28

x=7+28

x=35

 

-7x=28

-x=28/7

-x=4

x=-4

 

7-x=-28

-x=-7-28

-x=-35

x=35

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