I need help on these two I can get some of the way on 1st but can't seem to get 2nd

1. You have a 2 digit number

a. Divide the Number by product of 2 digits get 1 remainder 16

b. Diffrence of digits squared added to Product of digits give you number

Find the number

2. Solve System

$\displaystyle 2x^2+y+3xy=12$

$\displaystyle (x+y)^2-1/2y^2=7$