Here is another brain teaser that is taking over the world!

Below is the correct answer from our friends at SOMEECARDS.com, did you get it right?

Ready? Here it is: there are two horseshoes and two boots. One boot
(or horseshoe) is worth half as much as two boots. That was the big,
obvious thing a lot of people missed: there’s only one boot in the last line,
but two boots in the third line. Some people also forgot BIMDAS (it was
called PEMDAS in my day), aka “the order of operations”: Brackets,
Indices, Multiplication, Division, Addition, Subtraction.

Here’s the solution written out:

3xHorse = 30
Horse = 10

Horse + (2Horseshoe) + (2Horseshoe) = 18
10 + 4Horseshoe = 18
4Horseshoe = 8
Horseshoe = 2

(2Horsheshoe) – (2Boot) = 2.
4 – 2Boot = 2
Boot = 1

Boot + Horse x Horseshoe = ???
1 + 10 x 2 = ???
1 + 20 = 21

If that last step threw you off, remember the order of operations: multiplication is done before addition.