solve for x 1/x+3-1/x-6=9/20
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1/x+3-1/x-6=9/20
=1/(x+3)-1/(x-6)=9/20
={(x-6)-(x+3)}/{(x-6)(x+3)}=9/20
=-9/x2-6x+3x-18=9/20
=-20+18=x2-3x
=x2-3x+2=0
=x2-2x-x+2=0
=x(x-2)-1(x-2)=0
=(x-2)(x-1)=0
=x=2 ;x=1
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