The answer 45 and the other one to the question is invalid
Answer:
n = - 5/7
Step-by-step explanation:
6n + 5 = 4n - 5n
6n - 4n + 5n = - 5
7n = - 5
n = - 5/7
I think it would be b or c
You're going to use the substitution method for this.
First, we know that Y = x-7, so we can plug x-7 into everywhere we see Y!
3x - 3(x - 7) = 21
then we simplify
3x - 3x + 21 = 21
^ ^
These cancel out!
So we're left with...
21 = 21
That means that the solution to this equation is all real numbers!
