1.Solve (x)/(x+10)+(x-3)/(x+2)=7/5..I got that there is no solution, is that correct?

2. Solve (x)/(x-5)+1=(5)/(x-5)..I got that there is no solution for this one too, is that correct?
3. Express your result in simplest form, (4)/(xy)+(6)/(xy)..I got (10)/(xy) is that correct?
4. Simplify (3)/(4) divided by (4)/(5)...I got 15/16, is that right?

3 is correct.
2 has is indeterminate, in your language, that is probably no solution.
1 recheck.