设甲为y;乙为Z;若干为n;
解:2(y-90)=Z+90
2y-180=Z+90
2y=Z+270
y=Z/2+135
且:y+n=6(Z-n)
y=6Z-7n
于是:y=Z/2+135=6Z-7n
2y=Z/2+135+6Z-7n
2y=6.5Z+135-7n
y=3.25Z+67.5-3.5n
(不一定对٩(๑^o^๑)۶,很久没有做过了)