8/7 plus what equals 1/3?

Here we will show you how to calculate "what" in this sentence: "8/7 plus what equals 1/3?" We start by making this word problem into an algebraic equation where "what" is the variable "x".

8/7 + x = 1/3

To solve this equation, we want x alone on the left side of the equation so we start by subtracting 8/7 on both sides like this:

8/7 - 8/7 + x = 1/3 - 8/7

8/7 - 8/7 + x leaves x and 1/3 - 8/7 is -17/21 which means we end up with x = -17/21. Therefore, the answer to "8/7 plus what equals 1/3?" is as follows:

-17/21

It is always good to double-check your math to make sure you did it right. When we entered -17/21 for x in this equation 8/7 + x = 1/3, we get the following true equation which means our math is correct.

8/7 + -17/21 = 1/3

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