Question

Solve the proportion

Answer 1

`y=5.6` or
`y=28/5`

Explanation:

4/5 = y/7

⇒ Cross multiply:

4 × 7 = 5 × y

⇒ Multiply 4 × 7 & 5 × y:

`28=5y`

⇒ Solve the formed equation:

`28=5y`

⇒ Move all the terms containing y to the right side and the other values to the left side:

⇒ Add '-5y' to each side of the equation:

`28+-5y=5y+-5y`

⇒ Combine like terms:
`5y+-5y=0`

`28+-5y=0`

⇒ Add '-28' to each side of the equation:

`28+-28+-5y=0+-28`

⇒ Combine like terms:
`28+-28=0`

`0+-5y=0+-28`

`-5y=0+-28`

⇒ Combine like terms:
`0+-28=-28`

`-5y=-28`

⇒ Divide each side by '-5':

`y=5.6` or
`y=28/5`

hope this helps :)

Answer 2

`y = (28)/(5)`