davy94
davy94
22-02-2017
Mathematics
contestada
geometry help help help
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Аноним
Аноним
22-02-2017
BD = AC/2
4x+2 = (5x+13)/2
2(4x+2) = 5x+13
8x + 4 = 5x+13
8x - 5x = 13 -4
3x = 9
x = 3
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