Sagot :

bonjour,

a)

5x -7=0

5x= 7

x= 7/5

b)

7x-4 = 2x+6

7x-2x = 6+4

5x = 10

x= 10/5

x= 2

bjr

5x - 7 = 0

5x = 7

x = 7/5

7x - 4 = 2x + 6

7x - 2x = 6 + 4

5x = 10

x = 10/5

x = 2

bonne journée