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Sagot :

Réponse :

bonjour

5x-8=11x+2

5x-11x=2+8

-6x=10

x=10/-6=-5/3

4(a-7)=5-(a-7)=

4a-28=5-a+7

4a-28=-a+12

4a+a=12+28

5a=40

a=40/5=8

5(m+2)-2m=3(3+m)

5m+10-2m=9+3m

3m+10=9+3m

3m-3m=9-10

impossible

3(x+5)+5x=2(x-8)+13

3x+15+5x=2x-16+13

8x+15=2x-3

8x-2x=-3-15

6x=-18

x=-18/6=-3

3x/5=9/20

12x=9

x=9/12=3/4

x/5=(x-3)/2

2x=5x-15

2x-5x=-15

-3x=-15

x=-15/-3=5

7x-(5x+10)=2(x-5)

7x-5x-10=2x-10

2x-10=2x-10

2x-2x=-10+10  impossible

Explications étape par étape

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