Solving for xDate: 1/23/96 at 9:31:0 From: Anonymous Subject: Solving for x I need help on this problem: x/x+4 = x+1/x+8 Solve for x. Thanks for the help! Date: 6/14/96 at 14:31:35 From: Doctor Chaos Subject: Re: Solving for x This problem can be solved by setting it up as fractions and cross multiplying to get the next step: x^2+8x=x^2+5x+4 then simplify subtracting x^2 from both sides to get: 8x=5x+4 and next, subtract 5x from both sides to get: 3x=4 Finally divide both sides by 3 to get: x=4/3. As always, substitute back into the original to check the value: (4/3)/((4/3)+4) = ((4/3)+1)/((4/3)+8) Another method would be to graph x^2+8x and x^2+5x+4 and find out where the graphs cross. This will be the solution point where the x-coordinate is 4/3. -Doctor Chaos, The Math Forum |
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