Look at the pictures it explains the equation step by step tell me if you have any questions the answer is at the bottom
The expression (n+3) represents the measure of an exterior angle of a regular octadecagonal.
Answer:
9 - 5x = 7
Step-by-step explanation:
Nine (9) less (-) then the product (*) of 5*x, equals (=) to 7
9 - 5x = 7
You may go the super easy way and choose 1 as the whole number and 0.28 as the decimal number. Then you'd obviously have 
Otherwise, to be a bit more creative, you can observe that

And since 1/25=0.04, you can also choose 7 as the integer, and 0.04 as the decimal to get

Answer is x=-3, -1. You have two x values because they are broken down into two equations