FANTASTIC!
Absolutely fantastic! Love it! I spent over $20 on a dozen different apps before I stumbled upon this one, which is the only one capable of solving ALL the problems I required. Just wish I had found it sooner. The paid version is worth every penny. I could not be more pleased. The solution explanations are just a bonus for me. It would have been well worth the price for the answers alone. Great app!
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FX Algebra Solver