can someone help me on this question

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

Answer 1

10= N+M

4N+3M=2

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

Answer 2

why 10=N+M???

Answer 3

thank you