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

For which values of x is 2x-5＜-3x+20?

admin2011-03-08  42
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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