Question

Adam says that the expression 52-3y is equal to 20 when y=2. Explain why Adam's answer is incorrect

Answer 1

When you substitute y with 2, you get 52-3(2). -3(2)=-6.  52-6=46.  46 is not equal to 20.

Answer 2

The given expression is

`52-3y`

If
`y=2`, then the expression would be equal to

`52-3(2)=52-6=46`

As you can observe, the expression is equal to 46 not to 20.

Adam's answer is incorrect, because 46 isn't equal to 20, neither the expression, maybe he made a mistake when he did the operations.