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
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
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
Do you know?