Answer:
i think the answer is -9
Step-by-step explanation:
i got this answer because on a number line plot -17
when solving this equation adding a positive number means you go forward on the number line, so -17+8 is equal to 17-8. on a number line move forward 8 times and you will land on the number -9.
have a great day :> you can even do it on a calculator it will give you -9
