Question

Find the value of 7 Y if 3 bracket Y - 1 bracket is equal 21​

Answer 1

`7y = 56`

Explanation:

`3(y - 1) = 21`

Divide 3 on both sides:

`y - 1 = 7`

Add 1 to both sides:

`y = 8`

Multiply by 7 on both sides:

`7y = 56`