Warning:
. You just wrote - and +, adding them both would result in a 0; (positive + negative = 0). If you haven't checked twice before asking, it is your problem. I'm going to solve for:
x(100-15x) when x = 5.
Answer:
Step By Step Explanation:
You'll need to substitute (that word is hard, it means replace though) the x, and get a proper equation (because they already gave you the x).
Look at how ugly and hard this is: x(100-15x) When x = 5.
Now it's better when replacing the x: 5(100-15×5)
Put it in a calculator if you wanted to avoid step by step work, but I'll show you how to do it step by step if you wanted.
5(100-15×5)
(5)×(100)+(5)(-75)
500-375
=125.
So, write this for your answer:
x(100-15x) = 125 Because 5(100-15×5)=125. And x = 5.