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Sagot :

Réponse:

a. 5x=3x+3

5x-3x=3x-3x+3

2x=3

2x/2=3/2

x=1.5

b. 8x=12x+4

8x-12x=12x-12x+4

-4x=4

-4x/-4=4/-4

x= -1

c. 4-7y=10y

4-7y+7y=10y+7y

4=17y

4/17=17y/17

y=4/17

d. 7x+1=-4-x

7x+x=-4-x+x

8x+1-1=-4-1

8x=-5

8x/8 = -5/8

x= -5/8

e. 2+3x=7-3x

2+3x+3x=7-3x+3x

2-2+9x=7-2

9x=5

9x/9=5/9

x=5/9

f. 5+6x=-x-9

5-5+6x=-x-9-5

6x+x= -x+x-14

7x= -14

7x/7= -14/7

x= -2

g. 11x+3=8x+7

11x-8x+3=8x-8x+7

3x+3-3=7-3

3x=4

3x/3=4/3

x=4/3

J'espère t'avoir aidé(e), bonne soirée :)

A. 5x = 3x + 3
= 5x-3x = 3
= 2x = 3
= x =

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