Moe earns 15% more than her husband Joe. Together they make 78000 per year. What is Joe’s annual salary?

Question

Answer to two significant figures.

My answer was $31000, but the program doesn't seem to want to take it. Did I do something wrong?

Answer 1

if Joe makes J dollars, then Moe earns 1.15J

J + 1.15J = 78000
J = 36279

So, Joe makes $36279
Moe makes $41721

add 'em up to get 78000

Answer 2

Oh I found my mistake thanks. :)