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(x-2)/5-((x-3)/4) = -1/20 // + -1/20
(x-2)/5-((x-3)/4)-(-1/20) = 0
(x-2)/5-((x-3)/4)+1/20 = 0
(x-2)/5+(-1*(x-3))/4+1/20 = 0
(4*20*(x-2))/(4*5*20)+(-1*5*20*(x-3))/(4*5*20)+(1*4*5)/(4*5*20) = 0
4*20*(x-2)-1*5*20*(x-3)+1*4*5 = 0
20-20*x+140 = 0
160-20*x = 0
(160-20*x)/(4*5*20) = 0
(160-20*x)/(4*5*20) = 0 // * 4*5*20
160-20*x = 0
160-20*x = 0 // - 160
-20*x = -160 // : -20
x = -160/(-20)
x = 8
x = 8
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