13x-6.3x+x=46.8 x=多少
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13x-6.3x+x=46.8 x=多少
13x-6.3x+x=46.8 x=多少
13x-6.3x+x=46.8 x=多少
13x-6.3x+x=46.8
6.7x+x=46.8
7.7x=46.8
x=468/77
(13-6.3+1)x=46.8
7.7x=46.8
x=468/77
13x-6.3x+x=46.8
7.7x=46.8
x=46.8/7/7
x=468/77