80%×(1+45%)x-x=50等于几
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80%×(1+45%)x-x=50等于几
80%×(1+45%)x-x=50等于几
80%×(1+45%)x-x=50等于几
80%×(1+45%)x-x=50
0.8x+0.36x-x=50
0.16x=50
x=50/0.16=5000/16=312.5
(0.8*1.45-1)x=50
x=312.5
80%×(1+45%)x-x=50等于几
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