change the sentence into equation please

Question

a) the average of a certain number and 5 is one less than the number

b) when a number is halved and 5 is added, the result is 8 more than the original number

Answer 1

I'd write two equations. The first is (x+5)/2 = x-1

The second is x/2 + 5 = x +8

In the first equation (x+5)/2 indicates an average. An average is the sum of all numbers divided by the amount of total numbers. Since there are only 2 numbers, you would divide by 2.