Question 773962
18x+2(x-100)=3500
18x+2x-200=3500
20x = 3700

x = 185


Checking:

18(185)+2(185-100) = 3500

3330+2(85) = 3500

3330+170 = 3500

3500 = 3500

I can help you with more questions at: mthman@gmail.com

Thanks