simplify. (a) 15 (y–4)–2(y–9)+5(y +6)=0
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15y-60-2y+18+5y+30=0
=18y-12=0
=6(3y-2) =0
=3y-2=0
=y=2/3
=18y-12=0
=6(3y-2) =0
=3y-2=0
=y=2/3
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