Answer:
12
Step-by-step explanation:
x/40=30/100
x=12
520 pages. 390 divided by 3 is 130. Take that times 4 and you get 520. To check it, I took 520 divided by four (or you can multiply by 1/4) and got 130. Hope it helps!
Answer:27
Step-by-step explanation:
-5+x=22
5-5+x=22+5
X=27