Zeuss13 Zeuss13
  • 11-02-2017
  • Mathematics
contestada

Freddy is two years old than her brother. Twelve years ago, she was twice as old as he was. How old were they? Equation

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apologiabiology
apologiabiology apologiabiology
  • 11-02-2017
f=2+b
12 years ago
f-12=2(b-12)
f=2+b
2+b-12=2(b-12)
b-10=2b-24
minus b both sides
-10=b-24
add24
14=b

14-12=2
2+2=4

freddy was 4 and brother was 2
they are now 16 and 14
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