solve15(Y-4)-2(Y-9)+5(Y+6) =o
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15(y−4)−2(y−9)+5(y+6)=0
⇒15y−60−2y+18+5y+30=0
⇒18y−12=0
⇒18y=12
⇒y=1812=32
∴y=32
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