Explicación paso a paso:
x-y= 49
x= 49 +y
4x+2y = 110
2(2x+y) = 110
2x+y = 110/2
2x+y= 55
2x=55-y
x= 55-y/2
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Explicación paso a paso:
x-y= 49
x= 49 +y
4x+2y = 110
2(2x+y) = 110
2x+y = 110/2
2x+y= 55
2x=55-y
x= 55-y/2