Solve this simultaneous linear equation
50x + 56y=690
65x + 48y=711

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

X+ y = 5 ; x - y =3 solve using linear combination