6/(x-1)=9/(x+1)Cross multiply,6(x+1)=9(x-1)6x+6=9x-96x-9x=-9-6-3x=-15x=(-15)/(-3)x=5Check the solution:6/(5-1)=9/(5+1)6/4=9/6(3*2)/(2*2)=(3*3)/(3*2)3/2=3/2It's true.So, solution is x=5
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