makaveli713
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  • 18-08-2020
  • Mathematics
contestada

Write the inequality and solve: The sum of 81 and a number is greater than 4 times the same number.
n<27
n < 18
n<9
n <3

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Аноним Аноним
  • 18-08-2020

Answer:

n<27

Step-by-step explanation:

Let the unknown number be n

[tex]81 + n > 4 \times n \\ 81 + n > 4n \\ [/tex]

Subtract -n from both sides

[tex]81 + n - n > 4n - n \\ 81 > 3n \\ [/tex]

Divide both sides of the equation by 3

[tex] \frac{81}{3} > \frac{3n}{3} \\ 27 > n[/tex]

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