aylabarling
aylabarling aylabarling
  • 21-09-2020
  • Mathematics
contestada

Can someone solve this?

Can someone solve this class=

Respuesta :

unicorn3125
unicorn3125 unicorn3125
  • 22-09-2020

Answer:

           Jake is 13 years old

Step-by-step explanation:

D      - age of Dani

J = D+2    - age of Jake

E = 2J = 2(D+2) = 2D+4    - age od Ethan

Z = 2E = 2(2D+4) = 4D+8    - age of Zoe

The sum of their ages is 102:

     D  +  J  +  E  +  Z  = 102

D + D+2 + 2D+4 + 4D+8 = 102

     8D + 14 = 102

         -14          -14

      8D  =  88

      ÷8        ÷8

      D = 11

J = 11+2 = 13

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