Question

Write a real world problem that could be modeled by 1/2 x -2=8 and then solve it

Answer 1

Cut an apple pie into an unknown number of slices. Eat half of the slices. Eat another two slices. There are now eight slices left. How many slices in the first place?

The answer should be 20.

Explanation:

Let x be the number of slices.

`\begin{array}{ll}(1)/(2)\; x -2 = 8 & \text{Add 2 on both sides.} \\(1)/(2) \; x = 10 & \text{Multiply both sides by 2.} \\x = 20 & \text{Result.} \end{array}`.

How to come up with a "real world problem"?

Consider operators on the left-hand side in order.

1. Divide
   `x` by 2.
2. Subtract 2 from the previous result.

Now, come up with a real world operation for each of the step.