Объяснение:

(3+m)/2=(n-m)/8

2(n-m)=8(3+m)

2n-2m=24+8m

2n=24+8m+2m

2n=24+10m

n=(24+10m)/2

n=12+5m

[tex] \frac{3 + m}{2} = \frac{n - m}{8} \\ 2(n - m) = 8(3 + m) \\ 2n - 2m = 24 + 8m \\ 2n = 8m + 2m + 24 \\ 2n = 10m + 24 \: \: | \div 2 \\ n = 5m + 12[/tex]