Simultaneous Equations FIXXED by nn

print~['w5x100y-20z-30','a1b7c19d32e87f54g34h19i2j75k25l46m63n23o18','x2y4'][System.in.read()%3].replaceAll(/[0-9-]+/,'=$0\n')

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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