Question

There is a number written on the board. one student increased the number by 23, but another student decreased the same number by 1. the first student's result was 7 times greater than the result of the second student. what is the number written on the board?

Answer 1

Number 1 is the first student and number 2 is the second student. Y is the number that the first student for and t is the number that the second student got. X is the number written on the board. Because the first students result was 7 times greater, you make an equation showing that it equals to the number that the second student got. Substitute y and t into the equation and find x

Answer 2

The number is 5

23+5= 28
5-1=4

4 x 7 = 28