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2013-05-13T17:56:50+02:00

exo 10

 a) 5x-3x=3       b)8x-12x=4                           h=3.5x=6.5

2x=3                    -4x=4                                     x=6.5/3.5

x=3/2                    x=-4/4= -1

 

c) -7y-10y=-4         f) 7x=-14

     -17y=-4                 x=-14/7

     y= -4/-12

 

d)8x=-5

 x= -5/8                    g) 3x=7-3

                                   x=4/3

 e=6x=5

    x=  5/6