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OpenStudy (anonymous):
Solve for k. 9/2k-3 = 4/k+1 -3 21 -21
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sam (.sam.):
(9)/(2k-3)=(4)/(k+1) 9*(k+1)=4*(2k-3) 9k+9=4*(2k-3) 9k+9=8k-12 9k=-21+8k k=-21
OpenStudy (kaederfds):
K = -21
OpenStudy (anonymous):
cross multiply
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