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Sagot :

RISEOFKATHIR

Bonsoir,

1) 3x -6 = 15

3x = 15 + 6

3X = 21

x = 21/3 = 7

2) 3(2x+4) =31

6x + 12 = 31

6x = 31 - 12

6x = 19

x = 19/6

3) 5x+8 = 4x -25

5x - 4x = -25 - 8

x = -33

J'espère t'avoir aidé

PS : Si tu peux pas réduire laisse le résultat sous forme de fraction

FAMILYS

Bonsoir,

1) 3x - 6 = 15

3x = 15 + 6 = 21

x = 21 / 3 = 7

2) 3(2x + 4) = 31

6x + 12 = 31

6x = 31 - 12 = 19

x = 19/6

3) 5x + 8 = 4x - 25

5x - 4x = -25 - 8

x = -33

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