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x in (-oo:+oo)
(4/5)*x-(2/3) = (3*x+1)/2 // - (3*x+1)/2
(4/5)*x-((3*x+1)/2)-(2/3) = 0
(4/5)*x-((3*x+1)/2)-2/3 = 0
(-1*(3*x+1))/2+(4*x)/5-2/3 = 0
(-1*3*5*(3*x+1))/(2*3*5)+(2*3*4*x)/(2*3*5)+(-2*2*5)/(2*3*5) = 0
2*3*4*x-1*3*5*(3*x+1)-2*2*5 = 0
-21*x-20-15 = 0
-21*x-35 = 0
(-21*x-35)/(2*3*5) = 0
(-21*x-35)/(2*3*5) = 0 // * 2*3*5
-21*x-35 = 0
-21*x-35 = 0 // + 35
-21*x = 35 // : -21
x = 35/(-21)
x = -5/3
x = -5/3
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