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The process of solving the 22 nd question (2) of the Beijing 20 12 senior high school entrance examination mathematics question.
In fact, the first question is very similar to the second one. The first question is one third X=X, and the solution is X=0, so the answer is 0.
The flow of the second question is the same as this one, except that the corresponding M N equations in the X-axis and Y-axis equations need to be solved, so that the flow can be solved. I hope it will help you.