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Bonjour à tous, quelqu’un pourrez m’aider svp ? Mercii !

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MAUDMARINE

Bonjour

a. x + 7 = 3

x = 3 - 7

x = - 4

b. x + 7 - 3

x = - 3 - 7

x = - 10

c. x - 7 = 3

x = 3 + 7

x = 10

d. x - 7 = - 3

x = - 3 + 7

x = 4

e. 4x = 8

x = 8/4

x = 2

f. 8x = 4

x = 4/8

x = 1/2

g. x/8 = 4

x/8 = 32/8

x = 32

h. x/4 = 1/8

2x/8 = 1/8

2x = 1

x = 1/2.