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problema 20 ....va rog...repede ...

Problema 20 Va Rogrepede class=

Răspuns :

x=x/2+x/4+x/7+3
x=28x/56+14x/56+8x/56+3
x=50x/56+3|-50x/56
6/56*x=3|/x
6/56=3/x
x=56*3/6
x=28