Hi

1. Jess is 12 years older than steph

Let x and (x+12)represent steph's and jess' ages NOW respectively 

Question states*** 10 years ago...

  (x+12) - 10 = 2(x-10)

Solving for x

     22 = x, steph's age now.  Jess is 34.   (22+12)

CHECKING our Answer***  10 years ago...

    24 = 2*12



1. Bart is 16 years older than Lisa.

Let x and (x+16)represent lisa's and Bart's ages NOW respectively 

Question states*** In 3 years...

  (x+16) + 3  = 3(x+3)

Solving for x

     10 = 2x, 

       x = 5, Lisa's age now.  Jess is 21.   (5+16) 

CHECKING our Answer***  In 3 years...

   24 = 3*8 

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