Respuesta:
7x - 4y = 83
x + y = 28
Entonces sabemos: 7x = 83 + 4y
(x + y = 28)7
7x + 7y = 196
Sustituimos:
83 + 4y + 7y = 196
83 + 11y = 196
11y = 113
y = 10.27
x = 17.72
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Respuesta:
7x - 4y = 83
x + y = 28
Entonces sabemos: 7x = 83 + 4y
(x + y = 28)7
7x + 7y = 196
Sustituimos:
83 + 4y + 7y = 196
83 + 11y = 196
11y = 113
y = 10.27
x = 17.72