The difference between two integers is at most 16
x1 - big integer
x2- small integer
[tex]x_1 -x_2 \leq 16[/tex]
the smaller integer is 12
so
x2 = 12
substitution
[tex]x_1 -12 \leq 16[/tex]
solve for x1
however, note the fact larger
thus meaning
x1 > x2 applies to this problem