Seven minus 2 times a number is the same as the number minus 2

Assume the number is x

now, we will translate the written english into equation:

seven minus 2 times the number is 7-2x

the number minus 2 is x-2

we will equate these two equations (the question says that they are equal) ans solve for x as follows:

7-2x=x-2

7+2=x+2x

9=3x

x=3

the required number is 3

So this is what the question is saying

7-2n is equal to n-2