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Arte-miy333 [17]
3 years ago
9

În vacanța de vară, Mihai, Maria și

Mathematics
1 answer:
exis [7]3 years ago
8 0

Răspuns:

Mihai = 12kg

Maria = 15kg

Teodor = 13 kg

Explicație pas cu pas:

Fie x cantitatea de plante medicinale adunate de Mihai

Să fie cantitatea de plante medicinale adunate de Maria

Fie z cantitatea de plante medicinale adunate de Teodor

Dacă în vacanța de vară, Mihai, Maria și Teodor au adunat 48 de kilograme împreună grame de mentă atunci;

x + y + z = 48 ......... 1

De asemenea, dacă Mary a adunat cu 3 kilograme mai mult decât Mihai, atunci y = x + 3 ..... 2

Dacă Teodor a adunat de două ori mai puțin decât Mihai, atunci z = y-2

z = (x + 3) -2

z = x + 1 .... 3

Înlocuiți ecuația 3 și 2 în 1;

De la 1:

x + y + z = 40

x + (x + 3) + (x + 1) = 40

x + x + x + 3 + 1 = 40

3x + 4 = 40

Scădeți 4 din ambele părți

3x + 4-4 = 40-4

3x = 36

x = 36/3

x = 12

Înlocuiți x = 12 în ecuația 2 pentru a obține y

y = x + 3

y = 12 + 3

y = 15

De asemenea, z = x + 1

z = 12 + 1

z = 13

Prin urmare, Mihai a adunat 12 kg de plantă medicinală, Maria a adunat 15 kg de plantă, iar Teodor a adunat 13 kg de plantă

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