1000 this is because it is the right one
Find a common denominator...
1/5 = 7/35
7/35 = 7/35
6/25 = ... can't have 35 as a denominator. Not equivalent.
To solve y, we need to make y the only value on the left hand side of the equation:

Therefore the value of y = -14+3x.
Hope it helps!
1. 14:8, 21:12 28:16
2. 10/12 15/18 20/24
5. 5:4
6. No
7. No
8. Yes
9. No
10. 15