Question

o paine costa cat 3 cornuri, iar 2 paini si 4 cornuri costa 10 lei. cati lei a platit Raluca daca a cumparat 3 paini si 5 cornuri?

Answer 1

1p=3c 2p+4c=10 3p+5c=? 3c+3c+4c=10 10c=10 c=1 2p+4*1=10 2p+4=10 2p=10-4 2p=6 p=6:2 p=3 => 3*3+5*1=9+5=14