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OpenStudy (anonymous):
Solve the following system. x − y = 10 x + y = 8
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sam (.sam.):
Elimination x − y = 10 x + y = 8 ----------------- -2y=2 y=-1 Substitute y=-1 into x + y = 8. x + y = 8 x + (-1) = 8 x-1=8 x=?
OpenStudy (anonymous):
x =9?
sam (.sam.):
yes , correct :)
sam (.sam.):
yes
OpenStudy (anonymous):
thanks :D
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sam (.sam.):
welcome :)
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