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(3*x)/2-((x-3)/5) = (x+5)/7 // - (x+5)/7
(3*x)/2-((x-3)/5)-((x+5)/7) = 0
(-1*(x-3))/5+(-1*(x+5))/7+(3*x)/2 = 0
(-1*2*7*(x-3))/(2*5*7)+(-1*2*5*(x+5))/(2*5*7)+(3*5*7*x)/(2*5*7) = 0
3*5*7*x-1*2*7*(x-3)-1*2*5*(x+5) = 0
105*x-24*x-8 = 0
81*x-8 = 0
(81*x-8)/(2*5*7) = 0
(81*x-8)/(2*5*7) = 0 // * 2*5*7
81*x-8 = 0
81*x-8 = 0 // + 8
81*x = 8 // : 81
x = 8/81
x = 8/81
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