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解方程: 0.2分之(0.3x+0.5)-0.03分之(0.02-0.05x)=3分之(2x+1) (3x+5)/2-(2-5x)/3=(2x+1)/3 3(3x+5)-2(2-5x)=2(2x+1) 9x+15-4+10x=4x+2 15x=-9 x=-3/5=-0.6 x=-0.6
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