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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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