Your change from R50,if you spend y rand
To calculate the change you will receive when spending y rand, you need to subtract the amount spent from the initial amount of money. In this case, the initial amount of money is R50. So, the change you will receive is given by the formula:
Change = Initial amount - Amount spent
Change = R50 - y
For example, if you spend 20 rand, the change you will receive is:
Change = R50 - 20
Change = R30
Therefore, your change from R50, if you spend y rand, is R50 - y.