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0.2x+0.45/0.25%0.015+0.01x/0.15=0.5x%2.5

0.2x+1.8-0.015+0.01x/0.1-0.15=0.5x-2.5 1.8-0.015-0.15+2.5=0.5x-0.2x-0.01x/0.1 4.135=0.3x-0.01x/0.1 *0.1, 0.4135=0.03x-0.01x 0.4135=0.02x x=0.4135/0.02 x=20.675

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