How to do −8n+4(1+5n)=−6n−14 and must show all your steps

This is a very easy question. All required information's are already present in the question. It only needs step by step procedure to ultimately find the value of n. Now let us look into the given equation.
-8n + 4(1 + 5n) = -6n -14
-8n + 4 + 20n = -6n - 14
12n + 4 = -6n -14
12n + 6n = -14 - 4
18n = -18
n = - 18/18
   = -1
So the value of n in the given equation is -1.

There is 240 red cars and there is 400 blue cars because 240/3=80 and 80*5=400

Ithink the answer may be -7 by when dividing both sides by -3