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aide moi svp B1. Résoudre les equations :
a) 4 + 3r = 5x - 16 b) &r + 60 = 12x + 16
c) 3r + 4 = 20r + 21 d) 3x + 26 = 30 + 5x
e) 30 - 7x = 2x + 57 f) 8 + 11x = 9x + 10
g) 5 - x = 3r - 7
h) 4x + 11 = 12x + 43​

Sagot :

MITCHALEXANDRINE2314

H)4X+11=12X+43

4X-12X=43-11

-8X=32

-8X/-8=32/-8

X=-4

D)3X+26=30+5X

3X-5X=30-26

-2X=4

-2X/-2=4/-2

X=-2

E)30-7X=2X+57

30-57=2X+7X

-27=9X

-27/9=9X/9

-3=X

C)3R+4=20R+21

3R-20R=21-4

-17R=17

-17R/-17=17/-17

R=-1

F)8+11X=9X+10

8-10=9X-11X

-2=-2X

-2/-2=-2X/-2

1=X

H)4X+11=12X+43

4X-12X=43-11

-8X=32

-8X/-8=32/-8

X=-4