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Sagot :

TELEPHONE16

b) 3/5 (10x +2) = 1/4 -3/2 x

30x/5 + 6/5 = 1/4 -3/2x

6x +3/2x = -6/5 +1/4

12x/2 +3/2x = -24/20 +5/20

15/2 x = -19/20

 

d) -2x +9 = 3x-1  = -2x  -9/6 = 3x/2 -1/2

         6           2          6

                                 -2x/6 -3x/2 = +9/6 -1/2

                                    -2x/6 -9x/6 = 9/6 -3/6

                                     -11x/6 = 6/6

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