Can you help me please.

69

Step-by-step explanation:

I just kept going up by 3 until the 20th term

Hey there!

To find the opposite of a number, you switch its sign, and to do so, you would multiply by -1. This gives us the equation below.

n=-n+96

To find our number, we need to isolate all of our n's on one side of the equation. Let's try adding n to both sides.

2n=96

We divide both sides by 2.

n=48

As you can see, the opposite of 48 is -48, and 48 is 96 more than -48.

Therefore, our number is 48.

I hope this helps!