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2x + 2y = 66.000 |.3| 6x + 6y = 198.000
4x + 3y + 177.000 |.2| 8x + 6y = 354.000 _ = -2x = -156.000
x = 78.000
4s + 3d = 177000 (x2
8s + 6d = 354000
6s + 6d = 198000 _
2s = 156 000
s = 78 000