x=y+1
3y+3+5y=a+2
2y+2+3y=a,
a=11/3
ax+by=5
cx-2by=8,将x=5 ,y=-3,代入得
5a-3b=5----------------(1)
5c+6b=8----------------(2)
乙看错了c,但没看错a,b.误解为x=-3 ,y=3,代入ax+by=5得
-3a+3b=5---------------(3)
联立(1,2,3)解得
a=5
b=20/3
c=-32/5
x=y+1
3y+3+5y=a+2
2y+2+3y=a,
a=11/3
ax+by=5
cx-2by=8,将x=5 ,y=-3,代入得
5a-3b=5----------------(1)
5c+6b=8----------------(2)
乙看错了c,但没看错a,b.误解为x=-3 ,y=3,代入ax+by=5得
-3a+3b=5---------------(3)
联立(1,2,3)解得
a=5
b=20/3
c=-32/5