matokiwasssup matokiwasssup

13-03-2018
Mathematics

contestada

x+y= -9
x+2y= -25

According to the system of equations above, what is the value of y?

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evgeniylevi evgeniylevi

13-03-2018

Try this option:
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.

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