Question 930760
Let's turn these word problems into equations that we can solve.
The first sentence tells us that x-y=18, if we allow x and y to be the numbers we're looking for. The second sentence tells us that x=2y+5.

From here we insert the second equation into the first equation and solve.
{{{x-y=18}}}
{{{2y+5-y=18}}}
{{{y+5=18}}}
{{{y=13}}}

Then we plug this back into the first equation and solve.

{{{x-y=18}}}
{{{x-13=18}}}
{{{x=31}}}

So our numbers are 13 and 31, which we can check by plugging them back into the equations.