Hi!
Okay, so this actually isn't too bad! (For number 5) Just add the negative x over to get 2x. Then subtract 2 over to get -10. Then divide by 2 (-5) and you're done! For the rest, do the same thing. Get the x's on one side, get the regular numbers on the other, and divide! Hope that helped!
204 - 120 = 84
84/120 x 100 = 70%
answer: 70% increase
The answer is 3/10 ( hope this helps)
