68 less than 5 times a number is equal to the number

Question

this is a real hard math problem

Answer 1

Let n be the number then 5n-68=n, so subtract n from each side: 4n-68=0. Now add 68 to each side: 4n=68.

Divide through by 4: n=17. So the number is 17.

To check, multiply 17 by 5=85. 68 less than this is 85-68=17, which is the number. So the solution is correct.

Comments

thanks.