Tìm x Z, sao cho: a)(x1)2 1 b)72x6 49
c) (2x16)7 128
e ) 1 0 5  (1 3 5  7 x ) : 9  9 7 f) [3(x2):7]4120 g) x(x1)0
h)x3x2 28:23

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.