4/5:x=2/3解比例解:根据比例的基本性质,x=4/5÷2/3x=4/5x3/2x=6/5x=1又1/5
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4/5:x = 2/32x = 12/5x = 6/5
x=4/5÷2/3=6/5
4/5:x=2/32/3*x=4/5x=12/10=6/5