algebra

The recommended daily intake​ (RDI) of a nutritional supplement for a certain age group is 1500 ​mg/day. Actually, supplement needs vary from person to person. Write an absolute value inequality to express the RDI plus or minus 150 mg and solve it.

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  1. 1500 + 150 = 1650
    1500 - 150 =1350
    1350 </= RDI </= 1650

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  2. and
    |RDI-1500| </= 150

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  3. I mean
    | x - 1500| </= 150
    where x is the dose you take

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