6x + y = 44 (7)
2x - 7y = 0
42 + 7y = 308
44x = 308
x = 308 / 44
(x = 7)
Reemplazamos x, para hallar y:
2(7) - 7y = 0
14 - 7y = 0
- 7y = - 14
7y = 14
y = 14 / 7
(y = 2)
Comprobación:
6(7) + 2 = 44
42 + 2 = 44
44 = 44 ✔
2(7) - 7(2) = 0
14 - 14 = 0
0 = 0 ✔
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6x + y = 44 (7)
2x - 7y = 0
42 + 7y = 308
2x - 7y = 0
44x = 308
x = 308 / 44
(x = 7)
Reemplazamos x, para hallar y:
2x - 7y = 0
2(7) - 7y = 0
14 - 7y = 0
- 7y = - 14
7y = 14
y = 14 / 7
(y = 2)
Comprobación:
6(7) + 2 = 44
42 + 2 = 44
44 = 44 ✔
2(7) - 7(2) = 0
14 - 14 = 0
0 = 0 ✔