Question

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

Answer 1

Answer:

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.

Answer 2

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