Rewrite the expression by factoring out (y+6)

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Pls never taught i’m really confused and i rlly need

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?