
解方程..
2/7x=1/2乘3/14(2-3/4)x=4/5x除1/2=4/9乘1/41/3x+1/2=6/5...
2/7x=1/2乘3/14 (2-3/4)x=4/5 x除1/2=4/9乘1/4 1/3x+1/2=6/5
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2/7x=1/2乘3/14
2x=3/4
x=3/8
(2-3/4)x=4/5
5/4x=4/5
x=16/25
x除1/2=4/9乘1/4
x=1/18
1/3x+1/2=6/5
1/3x=6/5-1/2
x=21/10
2x=3/4
x=3/8
(2-3/4)x=4/5
5/4x=4/5
x=16/25
x除1/2=4/9乘1/4
x=1/18
1/3x+1/2=6/5
1/3x=6/5-1/2
x=21/10
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