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Problema 5 Va rog ! Urgent !

Problema 5 Va Rog Urgent class=

Răspuns :

x- cantitate mere
[tex]1zi = \frac{1}{5} x \\ 2zi = \frac{2}{5} ( x - \frac{1}{5} x) = \frac{2x}{5} - \frac{2x}{25} \\ 3zi = 84 \\ \frac{x}{5} + \frac{2x}{5} - \frac{2x}{25} + 84 = x \\ amplificam \: fractiile \: \frac{x}{5} si \: \frac{2x}{5} cu \: 5 \\ \frac{5x}{25} + \frac{10x}{25} - \frac{2x}{25} + 84 = x \\ \frac{13x}{25} + 84 = x | \times 25 \\ 13x + 2100 = 25x \\ 2100 = 25x - 13x \\ 2100 = 12x \\ x = 175 \\ [/tex]
coroana?
intreaga cantitate de mere
|_____|_____|_____|_____|_____|

in prima zi :
|_____|

rest 1 |____|____|____|____|____|

a doua zi :
|____|____|

rest 2 |____|____|____| 84 tone

84 : 3 = 28
28 × 2 = 56 tone (a doua zi)
28 × 5 = 140 (rest 1 )
140 : 4 = 35 tone (prima zi )
35 × 5 = 175 tone (intreaga cantitate de mere primita in cele 3 zile)

Verificam:
35 + 56 + 84 = 175 tone