Question

3 kg de rosii si 4 kg de castraveti costa 27 lei ,iar 3kg de rosii si 1kg de castravei costa 18 lei .Cat costa 4 kg de rosii si 2 kg de castraveti ?

Answer 1

3r +4c =27  I -
3r+1c = 18
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 /    3c =9
c =3 lei / kg  castraveti
3r+4*3 =27
3r =27-12 = 15
r =5 lei/ kg rosii

4r+2c =4*5+2*3 =20+6 =26 lei