exam Maths Puzzle Numerical Ability

5a
--- = 75
2

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exam Other Question

Sue and Tom Wright are assistant professors at the local university. They each take home about $40,000 per year after taxes. Sue is 37 years of age, and Tom is 35. Their two childr Solve for x and y:

x*2 + y = 7
x + y*2 = 11

I can see that the answer is x = 2, y = 3 BUT how can it be solved other than by graphing?