Question

I need answer soon!

If 70 + m + n - 20 = 80 and m = 2n, then what is the value of n?

It'd be great if there was an explanation, but I'm not too picky...

Answer 1

Plug m=2n into the first equation.
70+2n+n-20=80
n= 10

Answer 2

Answer:

70+2n+n-20=80

n= 10

Step-by-step explanation: