Slide 1

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5 40 30 3 : 1 40 30 =

30 3 {30 - (3 +3)} 40 3 {40 - (3 + 3)} 2000 10 , y , x = 10 , y , x , (y 10) , y , x , y 1 800 1 , , 700 3 Thanks To All