Question 751973
{{{
(x+y)/4=16
}}}

which can be written as

{{{x+y=64}}}


and 


{{{
3(x-y)=30
}}}


or 


{{{
x-y=10
}}}



system:

x+y=64
x-y=30



adding equations

2x=94
x=47

and so y=47-30=17



x=47, y=17


:)