Question

How can you check to see if this equation is correct? 12+39=49

Answer 1

Use the equation 49 - 39 = ___ and see if you get 12. You can also flip it and use 49 - 12 = ___ and see if you get 39.

Answer 2

By solving it.

Explanation:

In order to see if the equation is correct, you just have to perform the operations in both sides of the inequality and then check if those are equal, that means that the equation is correct, for example if both sides of the equation give as a result 10 then the equation is correct, now let´s do it with the problem:

12+39=49

51=39

Since 51 is not equal to 39 that means that the equation is not correct.