Question 362697
Let {{{m}}} = Mr Moby's age now
Let {{{n}}} = Nephew's age now
given:
(1) {{{m = 2n}}}
(2) {{{(m - 25)/(n - 25) = 3/1}}}
Substitute (1) in (2)
(2) {{{(2n - 25)/(n - 25) = 3}}}
{{{2n - 25 = 3n - 75}}}
{{{n = 50}}}
{{{m = 2n}}}
{{{m = 100}}}
Moby is 100 now