haileywatkins
29.07.2019 •
Mathematics
X+y= -9 x+2y= -25 according to the system of equations above, what is the value of y?
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Ответ:
if x+y=-9 is I (one)
and x+2y=-25 is II (two), then
if II-I, then (x+2y)-(x+y)=-25+9 ⇔ y=-16.
Ответ:
52 is the correct answer :)