Question 409474
Write an equation for each statement:
:
i am a 4 digit number 
a, b, c, d
;
the ratio of my first digit to my second digit is 3 to 1
{{{a/b}}} = {{{3/1}}}
cross multiply
a = 3b
:
the ratio of my third digit to my last digit is 1 to 3
{{{c/d}}} = {{{1/3}}}
d = 3c
:
the ratio of my first digit to my last is 2 to 3
{{{a/d}}} = {{{2/3}}}
2d = 3a
:
 all my digits add up to 29 what number
a + b + c + d = 29 
replace a with 3b, and replace d with 3c
3b + b + c + 3c = 29
4b + 4c = 29
I don't think you can solve this with integers, 4b + 4c cannot be an odd number