Seudónimo Seudónimo
  • 25-05-2022
  • Mathematics
contestada

If the current age is considered as x, 13 years ago he was x-13 and in 11 years he will be x+11:

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Аноним Аноним
  • 25-05-2022

Answer:

Therefore, Peter is 21 years old.

Step-by-step explanation:

    [tex]\bf{ x+11=\dfrac{(x-13)^2}{2} \ \Longrightarrow \ 2x+22=x^2-26x+169 }[/tex]

          [tex]\bf{ 0=x^2-28x+147=(x-21)(x+7) }[/tex]

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