Hey there!!
We have:
... (2y+1.6)/0.8 = 30/2.5
... (2y+1.6)/0.8 = 12
Multiplying 0.8 on both sides.
... (2y+1.6) = 12Ă—0.8
... 2y+1.6 = 9.6
Subtracting 1.6 on both sides:
... 2y = 9.6-1.6
... 2y = 8
Dividing by 2 on both sides:
... y = 8/2
... y = 4
Hence, the required answer is 4.
Hope my answer helps