Sagot :

Explications étape par étape :

i.   7m = 15

⇔ m = 15/7

j.   t * 5 = 3,5

⇔ t =  ( 7/2) / 5

⇔ t = 7/2 * 1/5

⇔ t = 7/10

k.   7x = 21

⇔ x = 21/7

⇔ x = 3

l.   18x = 29

⇔ x = 29/18

Bonsoir


7 * m = 15

7m/7 = 15/7

m = 15/7


t * 5 = 3,5

5t/5 = 3,5/5

t = 3,5/5

t = 35/50

t = (7 * 5)/(10 * 5)

t = 7/10

t = 0,7


7x = 21

7x/7 = 21/7

x = 21/7

x = (7 * 3)/7

x = 3


18x = 29

18x/18 = 29/18

x = 29/18