(1-2\5)x+2.4=80\100x
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(1-2\5)x+2.4=80\100x
(1-2\5)x+2.4=80\100x
(1-2\5)x+2.4=80\100x
3\5x+2.4=0.8x
0.6x+2.4=0.8x
0.2x=2.4
x=12
(1-2\5)x+2.4=80\100x
(1-2\5)x+2.4=80\100x
(1-2\5)x+2.4=80\100x
3\5x+2.4=0.8x
0.6x+2.4=0.8x
0.2x=2.4
x=12