Question 111438
Translate the given info:

"The sum of two numbers is 42"-->{{{x+y=42}}}




"Their difference is 6"-->{{{x-y=6}}}



So we get the system 

{{{x+y=42}}}
{{{x-y=6}}}



*[invoke solving_linear_system_by_substitution 1,1,42,1,-1,6]



So our two numbers are 24 and 18