math
posted by tony .
can someone help me on this question
ive been stuck on it for almost an hour
The mean of two numbers is 5. The sum of four times one number and three times the other number is 2. Find the numbers.
can u help me get start it by giving me the formula
please and thank you

10= N+M
4N+3M=2
from the first, N= 10M
then
4(10M)+3M=2
solve for M first. 
why 10=N+M???

thank you