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ǰλãҳ >> 1X9=10һ1=9,2X9=20һ2=18,3X9=30һ3=27,... >>

1X9=10һ1=9,2X9=20һ2=18,3X9=30һ3=27,...

,69=60-6=54 79=70-7=63 89=80-8=72 99=90-9=81

=9/2x11/9x20/3 =11/2x20/3 =11x10/3 =110/3 ѣ롾ɴ𰸡IJҴĶûף׷ʡлл

Ŀң޷ȷ京塣 ṩԭĿƬ

20.329+13 =40.69+1/3 =423/45+1/3 =438/45

5x+1/6=9x-1-x/3 15x+1/2=27x-3-x 11x=7/2 x=7/22

һ⣮ÿС3֣24֣ 1֪4x2n-5+5=0ǹxһԪһη̣n=_______ 2x=-1Ƿ2x-3a=7Ľ⣬a=_______ 3x=______ʱʽ x-1 ֵΪ෴ 4֪x x3ĺͱx26гΪ____...

5֮3x2/39/20 ⣺3/5x=9/20*2/3 3/5x=3/10 x=3/10*5/3 x=1/2

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x=4

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