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x=2(y-(x-y))
x=147-y
x=2(y-x+y)
x=147-y
x=4y-2x
x=147-y
3x=4y
x=147-y
x=0,75y
0,75y=147-y
x=0,75y
1,75y=147
x=0,75y
x=84
x=63