1 x
8x-0.75=— 1 +0.9 x=125.4 —=20%
7 7
1 6 1 x
4x-0.25=——x-—x=35 —=53%
3 5 7 5
8x-0.6=—7 +0.8 x=491.4 —=35%
4 8
x-0.65=——x-—x=30 —=176%
8 5 6 7
4x-0.35=— 6 +0.5 x=487.5 —=194%
6 9