七分之一{二分之一[五分之一(二分之x-二+1)-1]+x}=1
人气:230 ℃ 时间:2019-10-11 16:21:39
解答
1/7{1/2[1/5((x-2)/2 +1)-1]+x}=1
1/7 {1/2 [ 1/5(x/2 - 1 + 1) -1 ]+x}=1
1/7 {1/2[x/10 -1 ]+x}=1
1/7 {x/20 -1/2 +x }=1
x*21/140 -1/14= 1
x*21/140 =15/14
x=50/7
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