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x in (-oo:+oo)
(3/2)*x+1/5 = (7/5)*x // - (7/5)*x
(3/2)*x-((7/5)*x)+1/5 = 0
(3/2)*x+(-7/5)*x+1/5 = 0
1/10*x+1/5 = 0 // - 1/5
1/10*x = -1/5 // : 1/10
x = -1/5/1/10
x = -2
x = -2
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