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y in (-oo:+oo)
2*y+7/5 = 4*y-(1/10) // - 4*y-(1/10)
2*y-(4*y)+7/5+1/10 = 0
2*y-4*y+7/5+1/10 = 0
3/2-2*y = 0 // - 3/2
-2*y = -3/2 // : -2
y = -3/2/(-2)
y = 3/4
y = 3/4
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