Respuesta:
1)
3x + 2y = 15 (+)
6x - 2y = 8
-------------------------
9x = 23
x = 2.56
Hallamos "y"
3x + 2y = 15
3(2.56) + 2y = 15
2y = 7.32
y = 3.66
2)
3x + 7y = 40 (-)
2x + 7y = 35
----------------------------
x = 5
3x + 7y = 40
3(5) + 7y = 40
7y = 25
y = 3.57
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Respuesta:
1)
3x + 2y = 15 (+)
6x - 2y = 8
-------------------------
9x = 23
x = 2.56
Hallamos "y"
3x + 2y = 15
3(2.56) + 2y = 15
2y = 7.32
y = 3.66
2)
3x + 7y = 40 (-)
2x + 7y = 35
----------------------------
x = 5
Hallamos "y"
3x + 7y = 40
3(5) + 7y = 40
7y = 25
y = 3.57