Question 180237
lets call our positive integer ab. Remember this can be written like this 
:
10a+b
:
a=b+5.....eq 1
a+b=11....eq 2
:
take a's value in eq 1 and plug it into eq 2
:
b+5+b=11
:
2b=6
:
{{{highlight(b=3)}}}
:
{{{highlight(a=3+5=8)}}}
:
our number is 83