2/9 plus what equals 1/7?

Here we will show you how to calculate "what" in this sentence: "2/9 plus what equals 1/7?" We start by making this word problem into an algebraic equation where "what" is the variable "x".

2/9 + x = 1/7

To solve this equation, we want x alone on the left side of the equation so we start by subtracting 2/9 on both sides like this:

2/9 - 2/9 + x = 1/7 - 2/9

2/9 - 2/9 + x leaves x and 1/7 - 2/9 is -5/63 which means we end up with x = -5/63. Therefore, the answer to "2/9 plus what equals 1/7?" is as follows:

-5/63

It is always good to double-check your math to make sure you did it right. When we entered -5/63 for x in this equation 2/9 + x = 1/7, we get the following true equation which means our math is correct.

2/9 + -5/63 = 1/7

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