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Sagot :

Bonjour,

Résoudre les équations:

  • x/3+1/2= 7/6

x/3= 7/6-1/2

x/3= (7- 1*3)/6

x/3= 4/6

x/3= 2/3

3x= 6

x= 6/3

x= 2    S= { 2 }

  • x/4+1/2= x/8+3/2

x/4- x/8= 3/2-1/2

(x*2-x)/8= 1

x= 8    S= { 8 }

  • 2x/(x+5)= 3/4

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

8x= 3x+15

8x-3x= 15

x= 15/5

x= 3    S = { 3 }

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