Answer:
1/3D + 10 = 3/5D
10 = 3/5 D ÷ 1/3 D
10 = 3D/5 ÷ D/3
10 = 3D/5 × 3/D
(btw there is no cross cancleing, just straight up multiply.)
next
10 = 9D/5D
cancel the 10 and 5D to make 10 to 2, and 5d to D.
Next, cancel both the D's (the 9d and the d (the d becomes 1 which is just 9 over nothing. translates to just a simple 9.))
there is a 2 on the opposite side of the 9, so bring it under 9. so 9/2
then divide to get 4.5
4.5 is the answer!
Mark me brainliest if it is correct!