Question

Ajutor la ex 1 și 2. Dau coronita

Answer 1

1) 7 lazi mere+5 pere=600 kg/ x(-1)
7 mere+12 pere=901 kg

-7 m-5 p=-600 kg
7m+12p=901 kg

-7m-5p+7m+12p= - 600+901
7p=301 kg
P=43 kg pere
7m+5x43=600
7m=600-215
M=385/7
M=55 kg mere


2)a+b+c=120kg
B=3xa
C=2b=>c=2x3a=>c=6a
A+3a+6a=120
10a=120
A=12 kg prima lada
B=3x12
B=36 kg a 2 lada
C=2x36
C=72 kg a 3 lada