分からない問題はここに書いてね 469

>>517
x - y = -9/p <=> x = y-9/p
y -z = -11/p <=> z= y+11/p

p= x+y+z = y-9/p +y +y +11/p = 3y +2/p
y = 1/3 ( p-2/p) x=... z =...