x + y = 85
x - y = 25
● x= -y+85
-y+85-y=25
-2y=-60
y= 30
● x= -30+85
x= 55
rspuesta :
x=55
y=30
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x + y = 85
x - y = 25
● x= -y+85
-y+85-y=25
-2y=-60
y= 30
● x= -30+85
x= 55
rspuesta :
x=55
y=30