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(1/5)*(2*x-15)+3/5 = 4-(1/4) // - 4-(1/4)
(1/5)*(2*x-15)+3/5+1/4-4 = 0
1/5*(2*x-15)+3/5+1/4-4 = 0
(1/5*4*5*(2*x-15))/(4*5)+(3*4)/(4*5)+(1*5)/(4*5)+(-4*4*5)/(4*5) = 0
1/5*4*5*(2*x-15)+3*4+1*5-4*4*5 = 0
8*x-80-48+5 = 0
8*x-80-43 = 0
8*x-123 = 0
(8*x-123)/(4*5) = 0
(8*x-123)/(4*5) = 0 // * 4*5
8*x-123 = 0
8*x-123 = 0 // + 123
8*x = 123 // : 8
x = 123/8
x = 123/8
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