Bonjour, j'ai des équations à faire mais je ni arrive pas. a) x - 7 = 10 b) a sur 7 = 6 c) x - 4 = -11 d) t sur 3 = -21 e) 2v - 13 = 34 f) 5x + 31 = 3x g) 6x -

Bonjour,

a) x - 7 = 10

x= 10+7 = 17

b) a / 7 = 6

a = 6=7 = 42

c) x - 4 = -11

x= -11+4 = -7

d) t/ 3 = -21

t= -21 *3 = -63

e) 2v - 13 = 34

2v = 34+13 = 47

v = 47/2 = 23,5

f) 5x + 31 = 3x

5x-3x = -31

2x = -31

x= -31/2 = 15,5

g) 6x - 4 = 3x + 14

6x-3x = 14 +4

3x= 18

x = 18/3 = 6

h) x / 3 - 5 = -9

x/3 = -9+5

x/3 = -4

x= -4*3 = -12