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Sagot :

SAMIRA71

a 7x=15+2x

7x-2x=15

5x=15

x=15/5

x=3

b3+4x=3x-11

4x-3x=-11-3

x=-14

c 8(x+1)=4-x

8x+8=4-x

8x+x=4-8

9x=-4

x=-4/9

d 5(2+2x)=4(3-3x)

10+10x=12-12x

10x+12x=12-10

22x=2

x=2/22

×=1/11

j'espère que ca t' aide

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