Seudónimo Seudónimo

25-05-2022
Mathematics

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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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