-10(5/1y-2)+2/1(y+6)-10(5/1y-2)+2/1(y+6)

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-10(5/1y-2)+2/1(y+6)-10(5/1y-2)+2/1(y+6)

-10(5/1y-2)+2/1(y+6)-10(5/1y-2)+2/1(y+6)
-10(5/1y-2)+2/1(y+6)
-10(5/1y-2)+2/1(y+6)

-10(5/1y-2)+2/1(y+6)-10(5/1y-2)+2/1(y+6)
-10(5/1y-2)+2/1(y+6)
=-2y+20+0.5y+3
=-1.5y+23