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Sagot :

AYUDA

bjr

1) 3x-5= -1

3x - 5 + 5 = - 1 + 5

3x = 4

3x/3 = 4/3

x = 4/3

2) 7x+2= 12

7x + 2 - 2 = 12 - 2

7x = 10

7x/7 = 10/7

x = 10/7

3) 9x-1=v20​

bizarre ce √20 - énoncé ok ?

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