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5 équations à résoudre :
1) 13x+6=9x+22
2) 5x-2=2x+3
3) 3-2x=7+5x
4) 3(7x-8)=10x+4
5) 2(5+2x)=4x-5


Répondre :

13x + 6 = 9x + 22

13x - 9x = 22 - 6

4x = 16

x = 16/4

x = 4

5x - 2 = 2x + 3

5x - 2x = 3 + 2

3x = 5

x = 5/3

3 - 2x = 7 + 5x

3 - 7 = 5x + 2x

-4 = 7x

-4/7 = x

3(7x - 8) = 10x + 4

21x - 24 = 10x + 4

21x - 10x = 4 + 24

11x = 28

x = 28/11

2(5 + 2x) = 4x - 5

10 + 4x = 4x - 5

4x - 4x = -5 - 10

0 = -15

IMPOSSIBLE