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1) - 10x + 11y = 36 (4)
2) 4x - 10y = 27 (10)
- 40x + 44y = 144
40x - 100y = 270
------------------------
0x - 56y = 414
- 56y = 414
y = 414/-56
y = -207/28
Reemplazo y = -207/28 en ecuación 2.
4x - 10y = 27
4x - 10 (-207/28) = 27
4x + 2070/28 = 27
4x = 27 - 2070/28
756 - 2070 - 1314
4x = ------------------- = -------------
28 28
4x = -1314/28
x = -1314/28/4/1
x = -1314/112
x = -657/56
Solución :
x = -657/56
y = -207/28