Question

7lazi cu mere si 5 lazi cu pere cantaresc 600 kg,iar 7 lazi cu mere si 12 lazi cu pere cantaresc 901 kg. fao grafic pls repede dau coraoana

Answer 1

l-lazi
m-mere
p-pere
7lm+5lp=600kg
7lm+12lp=901kg
901-600=6lp
7lm=600-5lp⇒600-5lp+12lp⇒6lp=600⇒1lp=100kg⇒7lm=600-100=500kg
Sper c-am ajutat!  ^_^

Answer 2

Notam cele 7 lazi cu mere cu -" 7m"
-----------------5 lazi cu pere cu -" 5p"
7m+5p=600 kg => 7m =600 - 5p
7m+12p=901 kg
Il inlocuim pe 7m cu 600 -5p in a doua ecuatie.
600kg -5p +12p=901kg
600kg +7p=901kg
7p=901kg-600kg
7p=301kg
P=301 kg ÷7
P=43kg are o ladita cu pere.
7m+5×43=600kg
7m+215=600kg
7m=600kg-215
7m=385kg
M=385kg÷7
M=55kg are o ladita cu mere.
PROBA : 7×55+5×43= 600