2/7 plus what equals 8/7?

Here we will show you how to calculate "what" in this sentence: "2/7 plus what equals 8/7?" We start by making this word problem into an algebraic equation where "what" is the variable "x".

2/7 + x = 8/7

To solve this equation, we want x alone on the left side of the equation so we start by subtracting 2/7 on both sides like this:

2/7 - 2/7 + x = 8/7 - 2/7

2/7 - 2/7 + x leaves x and 8/7 - 2/7 is 6/7 which means we end up with x = 6/7. Therefore, the answer to "2/7 plus what equals 8/7?" is as follows:

6/7

It is always good to double-check your math to make sure you did it right. When we entered 6/7 for x in this equation 2/7 + x = 8/7, we get the following true equation which means our math is correct.

2/7 + 6/7 = 8/7

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