解方程 x(1-15%)=595 2x+3y=140 2x+3=17 40x-32 ×38=704 x- 0.8x=72 1.6(x=80)=20 x+2x=128.4x(1-15%)=595 2x+3y=140 2x+3=17 40x-32 ×38=704 x- 0.8x=72 1.6(x=80)=20 x+2x=128.4
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![解方程 x(1-15%)=595 2x+3y=140 2x+3=17 40x-32 ×38=704 x- 0.8x=72 1.6(x=80)=20 x+2x=128.4x(1-15%)=595 2x+3y=140 2x+3=17 40x-32 ×38=704 x- 0.8x=72 1.6(x=80)=20 x+2x=128.4](/uploads/image/z/303343-7-3.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B+x%EF%BC%881%EF%BC%8D15%EF%BC%85%EF%BC%89%3D595+2x%2B3y%3D140+2x%2B3%3D17+40x%EF%BC%8D32+%C3%9738%3D704+x%EF%BC%8D+0.8x%3D72+1.6%28x%3D80%29%3D20+x%2B2x%3D128.4x%EF%BC%881%EF%BC%8D15%EF%BC%85%EF%BC%89%3D595+2x%2B3y%3D140+2x%2B3%3D17+40x%EF%BC%8D32+%C3%9738%3D704+x%EF%BC%8D+0.8x%3D72+1.6%28x%3D80%29%3D20+x%2B2x%3D128.4)
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