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1.6x÷0.8=2求步骤?

1.6x÷0.8=2 1.6x=2×0.8 x=1

3x÷2-0.8=x 两边同乘以 2,得 3x - 1.6 = 2x x = 1.6

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;

(100-3X)÷2=8 50-1.5X=8 1.5X=42 X=28 0.8X-4x1.4=1.6 0.8X=1.6+5.6 0.8X=7.2 X=9

(1.6-2x)➗0.2=4 1.6-2x=0.8 2x=0.8 x=0.4

7.2x1.6+0.8 =(7.2x2+1)x0.8 =15.4x(1-0.2) =15.4-3.08 =12.32

①3.5X+1.8=12.33.5X+1.8-1.8=12.3-1.8 3.5X=10.5 3.5X÷3.5=10.5÷3.5 X=3;②0.8X-4=1.60.8X-4+4=1.6+4 0.8X=5.60.8X÷0.8=5.6÷0.8 X=7; ③5X÷2=10 5 2 X× 2 5 =10× 2 5 X=4 ④X-0.25X=3 0.75X=80.75X÷0.75=8÷0.75 X=10 2 3 ; ⑤X+ 2 5 X=21 1.4X=2...

①去括号得:8x-16=2x+14,移项合并得:6x=30,解得:x=5;②解得:x=8,经检验x=8是分式方程的解;③去分母得:2x+5x=8.4,解得:x=1.2.

6.4x12.5x0.5/(1.6x2.5x0.2) =6.4x0.5x12.5/(2.5x0.2x1.6) =3.2x12.5/(0.5x1.6) =8x12.5x0.4/0.8 =10x0.4/0.8 =4/0.8 =5

长方体? 表面积:1.6x1.5x2+1.6x0.8x2+1.5x0.8x2=9.76平方厘米。 体积:1.6x1.5x0.8=1.92立方厘米

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