已知(3a-b)/(2b-a)=7,(x+y)/(2x-y)=5,求(3ax-by)/(ax+2by)
已知(3a-b)/(2b-a)=7,(x+y)/(2x-y)=5,求(3ax-by)/(ax+2by)
日期:2022-04-05 13:21:19 人气:1
(3a-b)/(2b-a)=7,
3a-b=7(2b-a),
2a=3b
(ax+y)/(2x-y)=5,
x+y=5(2x-y),
3x=2y
(3ax-by)/(ax+2by),通过分子和分母同乘以6,
=6(3ax-by)/6(ax+2by)
=(18ax-6by)/(6ax+12by)
3a-b=7(2b-a),
2a=3b
(ax+y)/(2x-y)=5,
x+y=5(2x-y),
3x=2y
(3ax-by)/(ax+2by),通过分子和分母同乘以6,
=6(3ax-by)/6(ax+2by)
=(18ax-6by)/(6ax+12by)