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5.7Ⅹ一12X=27怎么解

5.7X-12X=27 解:-6.3X=27 X=27÷(-6.3) X=-30/7

应该是加号,乘法的分配率 4.3X2.4+2.4Ⅹ5.7 =2.4*(4.3+5.7) =2.4*10 =24 满意采纳奥 有疑问请追问~

4Ⅹ+7.1=12.5 解:4X=12.5-7.1 4X=5.4X=5.4÷4 X=1.35

5x ÷ 6 = 1.7 5x = 1.7 × 6 5x = 10.2 x = 2.04 ------------- 望采纳,谢谢

7.8+7x=5.1 7x=5.1-7.8 7x=-2.7 x=-27/70.

4/7 约等于0.57 108*4/7 =108*0.57 =61.56

x=5 解析: 5x+18=10x-7 18+7=10x-5x 25=5x x=5

错了

5x-3×7/10=1.4 5x-2.1=1.4 5x=3.5 x=0.7 所以原方程的解为x=0.7

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