1.(8%-X)/(9%-X)=(4.661-5)/(5.604-5)

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1.(8%-X)/(9%-X)=(4.661-5)/(5.604-5)
2.X=10%X+800+1000

2 x-10%x=800+1000
90%x=1800
x=1800/90%
x=2000
1 (8%-X)/(9%-X)=(4.661-5)/(5.604-5)
(8%-X)(5.604-5)=(9%-X)(4.661-5)
(8%-X)*0.604=(9%-X)*(-0.339)
8%*0.604-0.604x=-9%*0.339+0.339x
0.339x+0.604x=0.064*8%+0.339*9%
0.943x=0.04832+0.03051
0.943x=0.07883
x=0.0836

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