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Ma ajutati? Va rooog?

Ma Ajutati Va Rooog class=

Răspuns :

x/10 - 1/2 [x/2-(x+1/2)/5] =(1-x)/4
x/10 - x/4+(x+1/2)/10 =(1-x)/4    inmultesc cu 20
2x - 5x+2(x+1/2) =5(1-x)
2x - 5x+2x+1 =5-5x
4x+1 =5
4x =5-1
4x =4
x=1