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2/3X5/6等于多少

解: 2/3×5/6 =(2×5)/(3×6) =10/18 =5/9

2/3x÷5/6=12 解:2/3x=12×5/6 2/3x=10 x=10÷2/3 x=15

5/9比2/3x等于6/5 解:2/3x*6=5/9*5 4x=25/9 x=25/9÷4 x=25/36

2/3x+5/8÷5/2=5/6 解 2/3x+1/4=5/6 2/3x=5/6-1/4 2/3x=7/12 8x=7 解得x=7/8

1/5+2/3x=2.6 解: 2/3x=2.6-0.2 2/3x=2.4 x=24/10 x 2/3 x=8/5 x=1又3/5

如图

1/3+2/3x=5/6 2/3x=5/6-1/3 2/3x=1/2 x=1/2÷2/3 x=3/4

原题是3x还是3乘以?我就当3x来做 3x²-18x-5=0 b²-4ac=18²+60=384 x=(18+-8√6)/6 x1=3+8√6/6 x2=3-8√6/6

2/3x加1/6x等于15 2x/3+x/6=15 (2/3+1/6)x=15 (5/6)x=15 x=15*6/5 x=18

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