## Four EquationsMath brain teasers require computations to solve.Checkers, the smartest dog in the world, was doodling in his math diary and come up with three equations:
A-B=C D/E=F G+H=I He was about to write a fourth equation using multiplication when an interesting thought occurred to him. Instead of using a new set of numbers (J, K, L) for his fourth equation, he would use the answers of the three existing equations: C*F=I Now the only question in his mind was, "Can I replace the letters A through I with the digits 1 through 9 in such a way that all four of my equations are correct?" ## What Next?
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