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y in (-oo:+oo)
-56*y = 8/7 // - 8/7
-56*y-(8/7) = 0
-56*y-8/7 = 0
-56*y-8/7 = 0 // + 8/7
-56*y = 8/7 // : -56
y = 8/7/(-56)
y = -1/49
y = -1/49
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