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(1/2)*(8*y+2)-y+1 = 0
1/2*(8*y+2)-y+1 = 0
1/2*(8*y+2)-y+1 = 0
3*y+1+1 = 0
3*y+2 = 0
3*y+2 = 0
3*y+2 = 0 // - 2
3*y = -2 // : 3
y = -2/3
y = -2/3
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