Respuesta:
y = 3
Explicación paso a paso:
x + 3y = 16
x - y = 4
x = 16 - 3y
16 - 3y - y = 4
-4y = 4 - 16
-4y = -12
y = -12/ -4
x -3 = 4
x = 4 + 3
x = 7
comprobación
7 + 3 * 3 = 16
7 + 9 = 16
16 = 16 ✅✅
7 - 3 = 4
4 = 4 ✅✅
espero te sirva :) <3
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Respuesta:
y = 3
Explicación paso a paso:
x + 3y = 16
x - y = 4
x = 16 - 3y
16 - 3y - y = 4
-4y = 4 - 16
-4y = -12
y = -12/ -4
y = 3
x - y = 4
x -3 = 4
x = 4 + 3
x = 7
comprobación
x + 3y = 16
7 + 3 * 3 = 16
7 + 9 = 16
16 = 16 ✅✅
x - y = 4
7 - 3 = 4
4 = 4 ✅✅
espero te sirva :) <3