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4d+9d-(7-6d)=4d+9d-7-6d...how do i solve???
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cancel what is d sym on both side n u gonna b left with 6d=6d
actually it is wrong 6d is not = to -6d.meaning the question is undefined
my medal plz
Hey you're right, d=0 19d-7 =7d-7 12d=0 d=0 It is not an identity.
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