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please aidez moi
je resouds les équations suivantes:
x/3+4=5
-5x+7=-23
3x+4=19
svp help me


Répondre :

X/3 +4 = 5  =>  x/3 = 5-4   => x = 3(5-4) = 3

-5x +7 = -23 => -5x = -23 -7 = -30 => x = -30 / -5 = 6

3x + 4 = 19 => 3x = 19- 4 = 15 => x = 15/3 =5

bonjour,

x/3+4=5
x/3 = 5-4
x/3 = 1
x = 3

-5x+7=-23
-5x = -23-7
5x = 30


3x+4=19
3x = 19-4
3x =15
x = 5