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y in (-oo:+oo)
(1/4)*y-1 = -17.75 // + 17.75
(1/4)*y-1+17.75 = 0
1/4*y+16.75 = 0 // - 16.75
1/4*y = -16.75 // : 1/4
y = -16.75/1/4
y = -67
y = -67
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