A = 1/2(v+t)y for y ​

y = 2a/(v+t)

Step-by-step explanation:

Divide a on the LHS with 1/2(v+t) from the RHS

this gives a/{1/2(v+t)}

multiply a by 2 from 1/2(inverse of 1/2 = 2)

which gives y = 2a/(v+t)