Algebra 1 bug

I was working on a lesson for “Combining like terms with rational coefficients” I got it wrong and i tried checking what was wrong with my answer but everything proves my answer right except for the hint and when i try to press continue, the expression was -6/5-2/3v+4/15+1/3v, my answer was -1/3v-22/15 the hint even had the same steps I did but says the answer is -1/3v-14/15