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y in (-oo:+oo)
7*y-(3*y)+2/3 = 8*y+7/3 // - 8*y+7/3
7*y-(3*y)-(8*y)+2/3-(7/3) = 0
7*y-3*y-8*y+2/3-7/3 = 0
-4*y-5/3 = 0 // + 5/3
-4*y = 5/3 // : -4
y = 5/3/(-4)
y = -5/12
y = -5/12
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