If 3m+4n=47, and m+n=15, what is m?
Hello Guest!
\(3m+4n=47\\ m+n=15\ |\ -m\\ n=15-m\ |\ n\ einsetzen\\ 3m+4(15-m)=47\\ 3m+60-4m=47\\ -m+60=47\ |\ -60 \)
\(-m=47-60\\ -m=-13\ |\ \times (-1)\)
\(m=13\)
!
I think 43/3