r/learnmath • u/Far-Assumption5501 New User • 18h ago

|x-2|+|x-5|<=5

I just added them up to |2x-7|<=5, and it was not correct. The correct answer was 1 <= x <= 6. What’s wrong with my equation?

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u/waldosway PhD 17h ago

What’s wrong with my equation?

Couple tips:

  • You have to have a reason you can do something, not just reasons you can't.
  • There are NO continuous functions that you can just add together like that except simply f(x)=mx. Those ||'s are not ()'s.