Question

Is 9 a solution to 3y<27

Answer 1

Answer: No

Step 1: Rewrite the equation

3y<27

Step 2: Get y alone

To do this we need to divide both 3y and 27 by 3

3y<27

3y/3<27/3

y=9

Step 3: Substitution

We now know that y equals 9. Now let’s substitute this into the equation

3y<27

3(9)<27

27<27

Step 4: Determining the answer

Since 27 is not less than (27), 9 is not the solution for y. However, any number less than 9 would work for this equation

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Answer 2

No, because if y is in fact 9 then the expression
`3y<27` evaluates to
`27<27` which is a false hence y cannot be 9 but rather
`y\in(-\infty,9)`.

Hope this helps.