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1) 25x + 32y = 13 (12)
2) 35x - 12y = 4 (32)
300x + 384y = 156
1120x - 384y = 128
----------------------------
1420x + 0y = 284
x = 284/1420
x = 1/5
Reemplazo x = 1/2 en ecuación 1.
25x + 32y = 13
25 (1/5) + 32y = 13
25/5 + 32y = 13
5 + 32y = 13
32y = 13 - 5
32y = 8
y = 8/32
y = 1/4
Solución :
x = 1/5
y = 1/4