Mathematical equations can test not only your numeracy skills, but also your ability to focus on every detail. Today’s problem with the unknown x is not very difficult, but it can still be troublesome for anyone who doesn’t keep track of all the steps when making adjustments.

It’s time to stretch your brain. Today’s math puzzle isn’t just about memorized procedures, it’s about paying attention while solving. If you’ve ever overlooked a small detail in an equation and wondered why the correct result doesn’t come out, you know what we’re talking about. Problems like this reveal who can keep a cool head and work their way step by step to the correct number.

What’s in store for you today?

You have a linear equation: 8(3x – 2) – 5 = 7x + 19. Your task is to find the value of the unknown x. At first glance, it looks easy, but experience shows that it is when adjusting and rearranging the terms that mistakes are most often made. Try to go through the whole equation first and think about the procedure before you start calculating.

Calculate the example. ━━ Calculate the example. ( Source: Shutterstock )

The correct solution

Were you able to arrive at the correct number? Now you can check.

The result is x = 40/17, which is approximately 2.35.

First, multiply the parenthesis: 24x – 16 – 5 = 7x + 19. After adjusting the left side, we get 24x – 21 = 7x + 19. After dividing by seventeen, we get the final result x = 40/17.

Don’t keep this puzzle to yourself. Send it to friends or colleagues and see who in your circle has the best maths sense. Puzzles like this are not just fun, but really strengthen logical thinking and the ability to focus on detail. Fancy some more? You can find dozens of similar tests and puzzles on our website.