[size=200][color=#0000ff]A = 90, B = 10, p[sub]A[/sub], p[sub]B[/sub], v[sub]A[/sub] = p[sub]B[/sub]*B-p[sub]A[/sub]*A, v[sub]B[/sub] = p[sub]A[/sub]*A-p[sub]B[/sub]*B [/color][/size]