6/9 minus what equals 4/7?

Here we will show you how to calculate "what" in this sentence: "6/9 minus what equals 4/7?" We start by making this word problem into an algebraic equation where "what" is the variable "x".

6/9 - x = 4/7

To solve this equation, we want x alone on the left side of the equation so we start by subtracting 6/9 on both sides like this:

6/9 - 6/9 - x = 4/7 - 6/9

6/9 - 6/9 - x leaves -x and 4/7 - 6/9 is -2/21 which means we end up with -x = -2/21. Then, you multiply each side by -1 to get x = 2/21. Therefore, the answer to "6/9 minus what equals 4/7?" is as follows:

2/21

It is always good to double-check your math to make sure you did it right. When we entered 2/21 for x in this equation 6/9 - x = 4/7, we get the following true equation which means our math is correct.

6/9 - 2/21 = 4/7

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