[tex] \frac{3}x – \frac{4}{y} = 5 \\ \frac{7}{x} + \frac{3}{y} = 24[/tex]
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1 thought on “<br />[tex] \frac{3}x – \frac{4}{y} = 5 \\ \frac{7}{x} + \frac{3}{y} = 24[/tex]<br />​”

1. Answer:

   x=(y+z)=(x+y)+z

   x=(y+z)=

   4

   3

   +(

   6

   5

   +

   8

   −7

   )

   =

   4

   3

   +(

   24

   20+(−21)

   )

   =

   4

   3

   +(

   24

   −1

   )

   =

   4

   3

   +

   24

   −1

   =

   24

   18+(−1)

   =

   24

   17

   (x+y)+z=(

   4

   3

   +

   6

   5

   )+

   8

   −7

   =(

   12

   9+10

   )+

   8

   −7

   =

   12

   19

   +

   8

   −7

   =

   24

   38+(−21)

   =

   24

   38−21

   =

   24

   17

   x+(y+z)=(x+y)+z

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