Answers

2015-09-01T18:49:38+08:00
Sarah is now 24 years old and her niece is 12 years old. 8 years ago Sarah was 16 years old and her niece was 4 years old
0
how will i put this in equation?
In 8 years means in fututre :-)
  • Brainly User
2015-09-02T01:16:56+08:00

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Present:   Niece's age = x
               Sarah's age = 4x

In 8 years (+8) :  Niece's age = x + 8
                          Sarah's age = 2 (x+8)

Equation:
    4x = 2 (x+8)
Solution:  
    4x = 2 (x+8)
    4x = 2x + 16
    4x - 2x = 16
    2x = 16
    2x  = 16
     2       2
      x  = 8   

Substitute 8 for x:
Present Ages:  Niece's age = x
                                       = 8 years old

                     Sarah's age = 4x
                                       = 4 (8)
                                       = 24 years old
FINAL ANSWER:  Present age:  Niece is  8 years old and Sarah is 24 years old

TO Check their ages in 8 years:
                    Niece's age = x + 8
                                      = 8 + 8
                                      = 16 years old in 8 years (future)

                    Sarah's age is twice her niece's age in 8 years (future)
                                      = 2 (x + 8)
                                      = 2 (8 + 8)
                                      = 2 (16)
                                      = 32 years old



0