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y in (-oo:+oo)
-((1/2)*y)-2/3 = 7/8 // - 7/8
-((1/2)*y)-2/3-(7/8) = 0
(-1/2)*y-2/3-7/8 = 0
-1/2*y-37/24 = 0 // + 37/24
-1/2*y = 37/24 // : -1/2
y = 37/24/(-1/2)
y = -37/12
y = -37/12
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