For which values of x is 2x-5＜-3x+20? The first step in solving this problem is

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问题 For which values of x is 2x-5＜-3x+20?

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答案  The first step in solving this problem is to isolate the variable on one side of the inequality:
-5-20＜-3x-2x
   -25＜-5x
   5＞x
It is important to remember that when dealing with inequalities, multiplying or dividing by a negative number involves reversing the sign. In this case, both sides were divided by -5, so the sign changes from ＜to＞.

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For which values of x is 2x-5＜-3x+20? The first step in solving this problem is

im:Youlookunhappy,______?Linda:I’mhavingsomeproblemswithMath.A、What

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Jessie:Ohboy.Idon’tthinkIcaneverfiguretheproblemout.Peter:______A、

Theydiscussedtheproblemthreeorfourtimes,butcouldcometono______.A、end

Doctor:______Patient:I’mmuchbetter.Mystomachproblemisgone.NowIjust

Ifindtheseproblemsareeasy______.A、tobeworkedoutB、toworkthemoutC、to

WhenImentiontheproblem,I’mnot______allofyou.A、talkingaboutB、referrin

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Seldomdidwerealizethatmanyofourhairproblems______whatweeat.A、relyon

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