One apple and two plums cost $1.11. Two apples and 2 plum cost $1.38. How much does 1 apple and 1 plum cost?

answer: 0.69

answer explanation:

to start take 1.38 and 1.11 and subtract to find a price of a plum which is 0.27 since 1.38 have a extra plum then take 1.11 and take away 0.27 from 1.11 and get 0.84 then divide by 2 and get 0.42 so a apple cost 0.42 and a plum cost 0.27 together cost 0.69 which is nice