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Batman's age is 4 more than twice robin's age. When you add Batman's age to robin's age you get 58. How old is Batman and how old is robin?

Sagot :

Using a system of equations, it is found that:

  • Batman is 40 years old.
  • Robin is 18 years old.

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For our system, we have that:

  • Batman's age is x.
  • Robin's age is y.

Batman's age is 4 more than twice robin's age.

This means that:

[tex]x = 2y + 4[/tex]

When you add Batman's age to robin's age you get 58.

This means that:

[tex]x + y = 58[/tex]

Considering [tex]x = 2y + 4[/tex]

[tex]2y + 4 + y = 58[/tex]

[tex]3y = 54[/tex]

[tex]y = \frac{54}{3}[/tex]

[tex]y = 18[/tex]

Then

[tex]x = 2y + 4 = 2(18) + 4 = 36 + 4 = 40[/tex]

  • Batman is 40 years old.
  • Robin is 18 years old.

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