How can 12/18 be written in simplest form?

What does x = in this equation x+3+2x=x+5

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

Afair die is cast four times. calculate the probability of obtaining exactly two 6's round to the nearest tenth of a percent