<u>Answer:</u>
<u>Step-by-step explanation:</u>
Given that I buy a video game and pay $ 50 to the shopkeeper . And we need to find the expression how much change should I receive .
So , let us take that the video game costs x . There can be two cases .
<u>★</u><u> </u><u>Case </u><u>1</u><u> </u><u>:</u><u>-</u><u> </u>
When the cost of the product is same as the amount given . When the cost of the video game is $50 then the shopkeeper will give us no change .
<u>★</u><u> </u><u>Case </u><u>2</u><u> </u><u>:</u><u>-</u><u> </u>
When the cost of the video game is less than $50 then the shopkeeper will return us some change that is equal to the difference if the amount given to shopkeeper and the cost of the video game .
If the cost of the video game is x , then the amount given to us by the the shopkeeper will be ,