Răspuns:
Explicație pas cu pas:
a/2=b/3=c/5=k
a=2k,b=3k,c=5k
4a-2b+3c=51 => 4×2k-2×3k+3×5k=51
8k-6k+15k=51
17k=51 => k=51:17=3
a=2k=2×3=6
b=3k=3×3=9
c=5k=5×3=15
ma=(a+b+c)/3=(6+9+15)/3=30/3=10
Sᴘᴇʀ ᴄᴀ ᴛᴇ-ᴀᴍ ᴀᴊᴜᴛᴀᴛ!
