These problems are very fun to do. they may look easy but sometimes if you are not careful you can easily make a mistake. These types of problems keep your brain active while also challenging you on your basic knowledge of mathematics. The way to solve the problem is: It is given to you that the apple = 7. The next equation is Apple + 5 = Grape. We know that apple = 7, so 7 + 5 is equal to 12. Now we know grape = 12. The next equation is, bananas + 1 = Apple. To solve for bananas you have to subtract 1 from 7 (7-1=6) which equals 6. So now we know bananas= 6. The final part is Apple + Grape + Banana =?. This is the part where you would have to be careful because you must recognize that they are only adding one banana not three bananas. So what you would have to do is take the bananas = 6 and divide it by 3, (6/3=2). Show the final expression would be 7 + 12 + 2 = 21.