Video player not working?0:000:000:00SettingsQualityAutoAudioSpeed1×CaptionsOffBad Boy In ClassDula TVFunny videos since 2008Thumbs up0Thumbs down0 Share2.5K views May 2009A student sits at a classroom desk while a math lesson explains how to solve algebra equations and check the answers. Show transcript0:01With fractional or negative solutions. For equations such as these, using the balance model may prove more confusing than helpful.0:10Some students may let X stand for the total number of hamsters in the litter and write the equation 3 over 4X equals X minus 3.0:21Then they subtract 3 from the value of X to find the number of hamsters remaining.0:27One fourth the number of hamsters remaining can be found by multiplying 3 times the number of hamsters given away, or 3 times 3 equals 9.0:37Although this strategy does not use equations, it is a valid way to solve the problem.0:44Solve the equation 5 minus 2x equals 3x by first adding the same amount to both sides.0:53Check your solution. Solve the equation 10 plus 4z equals 2z minus 2.1:02Check your solution, negative 6. Solve the equation 1 over 2z equals z minus 4 by first multiplying both sides.1:14Check your solution.1:17Solve the equation 6 over 3 equals 8 minus k. 6.1:25Solve each equation by doing the same things both times. Proof more confusing is helpful.1:32Some students may let x stand for the total number of hamsters in the litter and write the equation 3 over 4x equals x minus 3.1:42Then they subtract 3 from the value of X to find the number of hamsters remaining.1:48One fourth the number of hamsters remaining can be found by multiplying 3 times.