It is the first choice. All you have to do is isolate A from 2A so you would divide by 2 and get A=bh/2
-36 because 64-100 (separate the terms)
24a-18a+12a is equal to 18a
hence, divide it by 6a
so you get 3a :)
0 + (6/10) + (8/100) + (5/1000)
You have a fraction of 3/2. 3/2=1.5
Therefore, she needs 1.5 gallons of blue paint per 1 gallon of yellow paint.