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y in (-oo:+oo)
y-7 = (1/4)*(y-2) // - (1/4)*(y-2)
y-((1/4)*(y-2))-7 = 0
(-1/4)*(y-2)+y-7 = 0
y-1/4*(y-2)-7 = 0
y-1/4*(y-2)-7 = 0
3/4*y-7+1/2 = 0
3/4*y-13/2 = 0
3/4*y-13/2 = 0
3/4*y-13/2 = 0 // + 13/2
3/4*y = 13/2 // : 3/4
y = 13/2/3/4
y = 26/3
y = 26/3
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