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x in (-oo:+oo)
x-(8/5)-(8/5) = -x/3 // + -x/3
x-(-x/3)-(8/5)-(8/5) = 0
x+(1/3)*x-8/5-8/5 = 0
4/3*x-16/5 = 0 // + 16/5
4/3*x = 16/5 // : 4/3
x = 16/5/4/3
x = 12/5
x = 12/5
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