Resolver :
b)3x-y=0
2x+y=5
b)3x-y=0
2x+y=5
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1) 3x - y = 0
2) 2x + y = 5
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5x + 0y = 5
5x = 5--despejamos "x"
x = 5/5
x = 1
El valor de x lo reemplazo en ecuación 1.
3x - y = 0
3 (1) - y = 0
3 - y = 0
- y = - 3
y = 3
Solución :
x = 1
y = 3