SOLUTION: if m and n are real numbers, i^2 =-1, and (m-m) -4i =7+ni, what is the value of m?

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Question 945049: if m and n are real numbers, i^2 =-1, and (m-m) -4i =7+ni, what is the value of m?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Check your equation.
The real term on the left hand side is m-m which equals zero.
I think you meant either m-n or n-m.
From the complex term,
-4i=ni
n=-4
Then either,
m-n=7 or n-m=7
m-%28-4%29=7 or -4-m=7
m%2B4=7 or -m=11
m=3 or m=-11