Additional comment: To help you visualize this, think of it without the Ys... ( -1 ) + 3 + ( -6 ) + 12 = 8 or... -1 + 3 - 6 + 12 = 8
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12y + 5 = 53 12y = 48 y = 4
12y = 8x + 24 so y = 2x/3 + 2
y(3y^2 - 12y + 4)
y^2 - 12y + 36 = 9 subtract 9 from each side y^2 - 12y + 27 = 0 easy factoring by inspection (y - 3)(y - 9) y = 3 y = 9
12y+2=146 12y=146-2 12y=144 144/12 12x12=144 y=12