Question

Which equation makes 7 less than twice a number is -1, 2n -7, 7 - 2n, 2(n-7), 2(7-n)

Answer 1

Lets,a number =n
Twice a number =2n
so, 7 less than twice =2n-7.
                                          
 

Answer 2

Let n be the number
Twice the number is 2n
Seven less than twice the number is 2n-7