已知(3a-b)/(2b-a)=7,(x+y)/(2x-y)=5,求(3ax-by)/(ax+2by)3a-b=7(2b-a),a=3/2b,x+y=5(2x-y),x=2/3y∴ax-2by/ax+2by=by-2by/by+2by……帮我找找哪错了,接下来该怎么写
问题描述:
已知(3a-b)/(2b-a)=7,(x+y)/(2x-y)=5,求(3ax-by)/(ax+2by)
3a-b=7(2b-a),a=3/2b,x+y=5(2x-y),x=2/3y
∴ax-2by/ax+2by=by-2by/by+2by……
帮我找找哪错了,接下来该怎么写
答