SOLUTION: Can you help me solve this problem 1. Ahlea is twice as old as Edella. 12 years ago, Ahlea was 3 times as old as Edella. Find their present ages. 2. Fifty coins consisting of P

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Question 1172542: Can you help me solve this problem
1. Ahlea is twice as old as Edella. 12 years ago, Ahlea was 3 times as old as Edella. Find their present ages.
2. Fifty coins consisting of P5 and P10 are worth P400. How many coins of each kind are there
Answer by josgarithmetic(39800) About Me  (Show Source):
You can put this solution on YOUR website!
system%28A=2E%2CA-12=3%28E-12%29%29

2E-12=3E-36
36-12=E
.

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system%28x%2By=50%2C5x%2B10y=400%29

system%28x%2By=50%2Cx%2B2y=80%29
Eq2-Eq1 gives you y=30, making that x=20.