(1+40%)乘以X乘以80%—X=15 (1+40%)乘以X乘以80%—X=15
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(1+40%)乘以X乘以80%—X=15(1+40%)乘以X乘以80%—X=15(1+40%)乘以X乘以80%—X=15(1+40%)乘以X乘以80%—X=15(1+40%)乘以X乘以80%—X=15
(1+40%)乘以X乘以80%—X=15 (1+40%)乘以X乘以80%—X=15
(1+40%)乘以X乘以80%—X=15
(1+40%)乘以X乘以80%—X=15
(1+40%)乘以X乘以80%—X=15 (1+40%)乘以X乘以80%—X=15
140%x×80%-x=15
140%x-x×80%=15
40%x×80%=15
40%x=15÷0.8
40%x=18.75
x=18.75÷0.4
x=46.875
是乘不是乘以
(1+40%)乘以X乘以80%—X=15
(1+40%)乘以X乘以80%—X=15 (1+40%)乘以X乘以80%—X=15
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