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2/7x+1.2=6.2

2/7x+1.2=6.22/7x=6.2-1.22/7x=5x=35/2

2/7x-1/6=1/2的结果是解析:2/7x-1/6=1/2解:2/7x=1/2+1/62/7x=2/3x=2/3÷2/7x=7/3

解:0.5x+1.2=6.2 0.5x=6.2-1.2 0.5x=5 x=5÷0.5 x=10 检验:把x=10代入等左右两边,左边=0.5x+1.2 =0.5*10+1.2 =5+1.2 =6.2 右边=6.2 所以左边=右边,所以x=10是原方程的解.

7分之二x十1.2=6.27分之二x=6.2-1.27分之二x=5x=35/2x=17.5

0.5X+1.2=6.2 0.5X=6.2-1.2 0.5X=5 X=5/0.58 X=10

x=10

27x一16=38.9移项得2.7x=38.9+1.62.7x=40.5两边同除以2.7得x=40.5/2.7x=15

2(7x-5)=5x+6.2 14x - 10 = 5x + 6.2 9 x = 16.2 x = 1.8

2/7x=7.2÷1.2x=6*7/2x=21

6.2x1.2+0.8x6.2=6.2x(1.2+0.8)=6.2x2=12.4

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