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2(x - 7) = 0,5 (y + 7)
x = 15 - y)
2x - 14 = 0,5y + 3,5
2(15 - y) - 14 = 0,5y + 3,5
30 - 2y - 14 = 0,5 y + 3,5
-2,5y = 3,5 - 30 + 14
-2,5y = 12,5
y = 5
x = 10