9/8 plus what equals 5/9?

Here we will show you how to calculate "what" in this sentence: "9/8 plus what equals 5/9?" We start by making this word problem into an algebraic equation where "what" is the variable "x".

9/8 + x = 5/9

To solve this equation, we want x alone on the left side of the equation so we start by subtracting 9/8 on both sides like this:

9/8 - 9/8 + x = 5/9 - 9/8

9/8 - 9/8 + x leaves x and 5/9 - 9/8 is -41/72 which means we end up with x = -41/72. Therefore, the answer to "9/8 plus what equals 5/9?" is as follows:

-41/72

It is always good to double-check your math to make sure you did it right. When we entered -41/72 for x in this equation 9/8 + x = 5/9, we get the following true equation which means our math is correct.

9/8 + -41/72 = 5/9

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