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x in (-oo:+oo)
(1/3)*(2/5-((1/5)*x)) = x-(3/4) // - x-(3/4)
(1/3)*(2/5-((1/5)*x))-x+3/4 = 0
(1/3)*((-1/5)*x+2/5)-x+3/4 = 0
1/3*(2/5-1/5*x)-x+3/4 = 0
(1/3*4*(2/5-1/5*x))/4+(4*(-x))/4+3/4 = 0
1/3*4*(2/5-1/5*x)+4*(-x)+3 = 0
8/15-64/15*x+3 = 0
53/15-64/15*x = 0
(53/15-64/15*x)/4 = 0
(53/15-64/15*x)/4 = 0 // * 4
53/15-64/15*x = 0
53/15-64/15*x = 0 // - 53/15
-64/15*x = -53/15 // : -64/15
x = -53/15/(-64/15)
x = 53/64
x = 53/64
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