X(1-6%)+(830-X)(1-5%)-3=830 求详细解题过程~

X(1-6%)+(830-X)(1+5%)-3=830
2024-12-21 23:56:41
推荐回答(3个)
回答1:

解:X(1-6%)+(830-X)(1-5%)=833
0.94X+0.95(830-X)=833
0.94X+0.95*830-0.95X=833
-0.01X+788.5=833
X=-4450

回答2:

X(1-6%)+(830-X)(1-5%)-3=830
X-6X%+830-830×5%-X+5X%-3=830
-X%-830×5%=3
-X-830×5=300
X=-4450

回答3:

x(1-6%)+(830-x)(1-50%)-3=830
解:x-6%x+[(830-x)50%]=830+3
94%x+(415-50%x)=833
94%x+415-50%x=833
94%x-50%x+415=833
44%x+415=833
44%x=833-415
44%x=418
x=950
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