👤
ARIELLL
Answered

Résoudre les équations .
1) 3x =  21 
2) x + 12 = 33 
3) 32 - x = 7 
4) 2x + 11 = 7x +6
5) x/42 = 1/3
6) 2 ( x - 5 ) = x - 9 
7) 8/x = 56/63
8) 7x -25 = 5x + 13
9) 2x - 7 = 8 - x  
Aidez moi svp parce que la c'est la galère avec ces équation svp c pour un dm ! merci  

Sagot :

CASSOU2
1) x=7  (x=21/3)
2) x=21  (x=33-12)
3) x=39  (x=7+32)
4) 2x-7x = 6-11
    -5x =-5
      x=1   (x=-5/-5)
5) x=14  (x= 1/3*42)
6) 2x-10=x-9
    2x -x=-9+10
     x=1
7) x=64/9
8) 7x-5x=13+25
   2x=38
    x=19   (x=38/2)
9) 2x+x=8+7
   3x=15
    x=5   (x=15/3)

voici j'espère t'avoir aidé.
WINNER123
Bonsoir

1) 3x =  21
x = 21/3 ou 7
2) x + 12 = 33
x = 33 -12
x = 21
3) 32 - x = 7
-x = 7 -32
-x = -25
x = 25

4) 2x + 11 = 7x +6
2x -7x = 6 -11
-5x = -5
x =1

5) x/42 = 1/3
x/42 = 14/42
x = 14

6) 2 ( x - 5 ) = x - 9
2x -10 = x -9
2x -x = -9+10
x = 1

7) 8/x = 56/63
?
8) 7x -25 = 5x + 13
7x -5x = 13 +25
2x = 38
x = 19

9) 2x - 7 = 8 - x 
2x +x = 8 +7
3x = 15
x = 5

Other Questions

© 2024 IDNLearn. All rights reserved.