# The Truth and Nothing But The Truth

Here’s a question that mixes inequalities and equations. See if you can successfully combine the two to figure out what must be true.

## Question of the Day

If $2x+y =30$ and $y < 10$ which of the following must be true?

Remember, inequalities can be treated exactly like equations as long as you’re not multiplying or dividing by a negative. If you substitute in your inequality about y to your equation, you’re well on your way to a correct answer and test day success!

## 2 thoughts on “The Truth and Nothing But The Truth”

1. Can we solve this using plug in of numbers and eliminating the wrong choices? I think it will be quicker.

2. Yes certainly that is possible. Certainly Answer choice D and E can be eliminated very quickly by plugging in the answer choices.