You would add 1 to both sides to get the y alone on the right side. Then it would be y = 1+ -1/2 which is y = 1/2. Hope you understand better!
Answer:
38
Step-by-step explanation:
4*9 1/2=38
Hand written explanation:
4*9=36
4*1/2=4/2=2
36+2=38
Step-by-step explanation:

Hence, 2.50 in the ratio 4 : 1 can be divided as 2 and 0.5