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1.6x÷0.8=2求步骤?

1

x+1.6=0.8/x x²+1.6x-0.8=0 10x²+16x-8=0 5x²+8x-4=0 (5x-2)(x+2)=0 5x-2=0,那么x1=2/5 x+2=0,那么x=-2

①0.273÷x=0.35 0.273×1x×x=0.35×x 0.35x=0.273 0.35x÷0.35=0.273÷0.35 x=273350; ②x×1.6=0.8641.6x÷1.6=0.864÷1.6 x=0.54 ③x×3.6=0.864 3.6x=0.8643.6x÷3.6=0.864÷3.6 x=0.24; ④x÷0.756=90 x÷7561000=90x×1000756×7561000=90×7561000 x=68.04;

(1.6+x)÷0.8=3.2 1.6+x=3.2x0.8 1.6+x=2.56 x=0.96

=0.8÷0.8*1.6*1.6=1*1.6*1.6=2.56

0.8*1.6÷0.8*1.6=0.8÷0.8*1.6*1.6=1*1.6*1.6=2.56

(2.8-2.5x0.8)÷1.6 =(2.8-2)÷1.6 =0.8÷1.6 =0.5

因题干条件不完整,缺少文字,不能正常作答。

3.6

1.6x乘0.8x=24 1.6×0.8x²=24 1.28x²=24 x²=1200/16×4 x=±5√3/2

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