Question

Rewrite so the subject can be Y in the formula d=m-y/y+n

Answer 1

y =
`(m-dn)/(d+1)`

Explanation:

given d =
`(m-y)/(y+n)`

multiply both sides by (y + n)

d(y + n) = m - y ← distribute left side

dy + dn = m - y ← add y to both sides

dy + y + dn = m ← subtract dn from both sides

dy + y = m - dn ← factor out y on the left side

y(d + 1) = m - dn ← divide both sides by (d + 1)

y =
`(m-dn)/(d+1)`