urgent svp devoir pour demain jai des equations a resoudre merci avance : 3x-7=2 1+5x=-9 2x+7=13 3-9x=-15 2x+6=-7 7-3x=14 5+6x=-11 6-x=-2 7x-2=0 -x-9=10 4x+1=0

Salut,

3x-7=2
3x = 2+7
3x = 9
x = 9/3 = 3

1+5x=-9
5x = -9 -1
5x = -10
x = -10/5
x = -2

2x+7=13
2x = 13 - 7
2x = 6
x = 6/2
x = 3

3-9x=-15
-9x = -15 - 3
-9x = -18
x = -18/-9 = 2

2x+6=-7
2x = -7-6
2x = -13
x = -13/2

7-3x=14
-3x = 14 - 7
-3x = 7
x = 7/-3
x = -7/3

5+6x=-11
6x = -11-5
6x = -16
x = -16/6
x = -8/3

6-x=-2
-x = -2-6
-x = -8
x = 8

7x-2=0
7x = 2
x = 2/7

-x-9=10
-x = 10+9
-x = 19
x = -19

4x+1=0
4x = -1
x = -1/4

9-x=6
-x = 6 - 9
-x = -3
x = 3

2-x=5
-x = 5-2
-x = 3
x = -3

2x-5=3
2x = 3 + 5
2x = 8
x = 8/2 = 4

7x+1=15
7x = 15-1
7x = 14
x = 14/7 = 2

Bonne soirée !

3x-7=2------------> 3x = 2+7--->x= 9/3 ---> x= 3
1+5x=-9---------> 5x = -9 -1 ----> x = -10/5 ----> x= -2
2x+7=13 -------> 2x = 13-7 -----> x = 6/2 ---> x= 3
3-9x=-15-------->-9x = -15-3 ----> x = -18/-9 ---> x= 2
2x+6=-7------> 2x = -7-6 -----> x = -13/2
7-3x=14 ------> -3x = 14-7 ----> x = 7/-3
5+6x=-11------> 6x = -11-5 -----> x = -16/6 ---> x = -8/3
6-x=-2--------> -x= -2-6 ---> x= 8
7x-2=0----->7x = 0+2 ---> 2/7
-x-9=10---> -x =10+9 ---> x = -19
4x+1=0-----> 4x= -1----> x= -1/4
9-x=6-------> -x = 6-9----> x=3
2-x=5-------> -x = 5-2---> x= -3
2x-5=3----> 2x = 3+5----> x = 8/2 ---> x= 4
7x+1=15----> 7x= 15-1---> x= 14/7---> x = 2