5/3 plus what equals 2/5?

Here we will show you how to calculate "what" in this sentence: "5/3 plus what equals 2/5?" We start by making this word problem into an algebraic equation where "what" is the variable "x".

5/3 + x = 2/5

To solve this equation, we want x alone on the left side of the equation so we start by subtracting 5/3 on both sides like this:

5/3 - 5/3 + x = 2/5 - 5/3

5/3 - 5/3 + x leaves x and 2/5 - 5/3 is -1 4/15 which means we end up with x = -1 4/15. Therefore, the answer to "5/3 plus what equals 2/5?" is as follows:

-1 4/15

It is always good to double-check your math to make sure you did it right. When we entered -1 4/15 for x in this equation 5/3 + x = 2/5, we get the following true equation which means our math is correct.

5/3 + -1 4/15 = 2/5

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