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y in (-oo:+oo)
3*y = (-1/2)*(17/2)+2 // - (-1/2)*(17/2)+2
3*y-((-1/2)*(17/2))-2 = 0
3*y+17/4-2 = 0
3*y+9/4 = 0 // - 9/4
3*y = -9/4 // : 3
y = -9/4/3
y = -3/4
y = -3/4
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