What plus 4/5 equals 5/7?

Here we will show you how to calculate "what" in this sentence: "What plus 4/5 equals 5/7?" We start by making this word problem into an algebraic equation where "what" is the variable "x".

x + 4/5 = 5/7

To solve this equation, we want x alone on the left side of the equation so we start by subtracting 4/5 on both sides like this:

x + 4/5 - 4/5 = 5/7 - 4/5

x + 4/5 - 4/5 leaves x and 5/7 - 4/5 is -3/35 which means we end up with x = -3/35. Therefore, the answer to "What plus 4/5 equals 5/7?" is as follows:

-3/35

It is always good to double-check your math to make sure you did it right. When we entered -3/35 for x in this equation x + 4/5 = 5/7, we get the following true equation which means our math is correct.

-3/35 + 4/5 = 5/7

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