Question

3 cornuri.......... 5 pâini.......... 2300 g
4 cornuri.......... 2 pâini.......... 1200 g
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1 corn + 1 pâine = ? g

Answer 1

3c + 5p =2300|*4

4c+2 p= 1200|*(-3)

 

=>

12c+20p=9200

-12c-6p=-3600

=> 14p=5600

P=400 g

= > c=(9200-8000)/12

c=1200/12

c=100

c+p=500 g