解下列方程:
(1)-x+3x=7-1;
(2)6y+12y-9y=10+2+6.
(1)合并同类项得2x=6,
系数化为1得x=3;
(2)合并同类项得9y=18,
系数化为1得y=2.
流注的总病机是:()
A.正气不充、邪气壅滞
B.正气内虚、邪毒炽盛
C.正气不虚、邪气壅滞
D.正气不虚、邪毒炽盛
E.正气内虚、邪气壅滞
I don't understand the text there are few new words in it. [ ]
A. so
B. because
C. if
D. though