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20-02-2018
Mathematics

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[tex] \frac{238 + 2x}{5} \geqslant 80[/tex]

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20-02-2018

(238+2x)/5≥80
238+2x≥80*5
238+2x≥400
2x≥400-238
2x≥162
x≥162/2
x≥81

Answer: x≥81

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