SOLUTION: betty is twice as old as cathy was two years ago. the difference of their present age is 7. find the age of betty now.

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Question 805088: betty is twice as old as cathy was two years ago. the difference of their present age is 7. find the age of betty now.
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
1) B=2(C-2)=2C-4
2) B-C=7

B=C+7

so that
C+7=2C-4
7+4=2C-C
C=11
thus

B=18