The sum of a number and 9 is - 7. What does that mean or what's the equation

Answer: x+9 = - 7

Step-by-step explanation:

What this statement means is that the sum or combining/adding of 9 and another number gives you - 7 as the answer. We can write an equation to figure out what the other number is.

Let's use x as the unknown/other number.

x+9 = - 7

That is what your set up equation would look like. To solve for x, you simply subtract 9 on both sides.

x=-16