Question 1162830
2x/3x=2/3 x is the number of multiples, which is the same for each. We just don't know how many multiples, only that there is a single value for x in this store.
(2x+30)/3x=3/4
cross-multiply
9x=8x+120
x=120
so started with 240 cars and 360 trains
got 30 cars and now has 270 cars and 360 trains, and that is a 3:4 ratio (divide both by 90)