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(x+4)/5+(x-1)/4 = 37/10 // - 37/10
(x+4)/5+(x-1)/4-(37/10) = 0
(x+4)/5+(x-1)/4-37/10 = 0
(4*10*(x+4))/(4*5*10)+(5*10*(x-1))/(4*5*10)+(-37*4*5)/(4*5*10) = 0
4*10*(x+4)+5*10*(x-1)-37*4*5 = 0
90*x-740+110 = 0
90*x-630 = 0
(90*x-630)/(4*5*10) = 0
(90*x-630)/(4*5*10) = 0 // * 4*5*10
90*x-630 = 0
90*x-630 = 0 // + 630
90*x = 630 // : 90
x = 630/90
x = 7
x = 7
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