4x-3y分之3x-7y=-3分之2 ,x:3y=?

2018-04-18 5:52 pm

回答 (1)

2018-04-18 8:57 pm
Sol
(3x-7y)/(4x-3y)=2/(-3)
-3(3x-7y)=2(4x-3y)
-9x+21y=8x-6y
27y=17x
x:y=27:17
x:3y=27:51=9:17


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