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Solutions on a number line; adding and subtracting

Solutions on a number line; adding and subtracting

Secondary 2
  1. Solve \(x-2.5\le-1\) and represent the solution on a number line. Is \(x=1.5\) a solution? Explain.
  2. The number line shows the solution of the inequality \(x+k>3\), where \(k\) is a constant. Write down the inequality shown, and find the value of \(k\).

Solution:

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Answer:(a) \(x\le1.5\); yes, \(1.5-2.5=-1\le-1\) (b) \(x>5\); \(k=-2\)

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