Explicación paso a paso:
x - 2y = 15...(1)
-x+3y = 20...(2)
Sumamos ecuaciones (1)y (2)
x - 2y = 15 (+)
-x+3y = 20
y = 35
x -2(35)=15
x - 70= 15
x = 15+70
x = 85
Los valores de x , y son:
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Explicación paso a paso:
x - 2y = 15...(1)
-x+3y = 20...(2)
Sumamos ecuaciones (1)y (2)
x - 2y = 15 (+)
-x+3y = 20
y = 35
x -2(35)=15
x - 70= 15
x = 15+70
x = 85
Los valores de x , y son:
x = 85
y = 35