3/7 minus what equals 1/5?

Here we will show you how to calculate "what" in this sentence: "3/7 minus what equals 1/5?" We start by making this word problem into an algebraic equation where "what" is the variable "x".

3/7 - x = 1/5

To solve this equation, we want x alone on the left side of the equation so we start by subtracting 3/7 on both sides like this:

3/7 - 3/7 - x = 1/5 - 3/7

3/7 - 3/7 - x leaves -x and 1/5 - 3/7 is -8/35 which means we end up with -x = -8/35. Then, you multiply each side by -1 to get x = 8/35. Therefore, the answer to "3/7 minus what equals 1/5?" is as follows:

8/35

It is always good to double-check your math to make sure you did it right. When we entered 8/35 for x in this equation 3/7 - x = 1/5, we get the following true equation which means our math is correct.

3/7 - 8/35 = 1/5

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