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OpenStudy (anonymous):
Using elimination to solve the system 2x + y = 8 and x + y = 4, what is the first step?
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OpenStudy (anonymous):
multilpy first equation by -1
OpenStudy (anonymous):
subtract the second from the first
OpenStudy (anonymous):
y's cancel 2x-x=x; x=(8-4)
OpenStudy (anonymous):
The basic idea is to cancel one of the variables upon subtraction.
OpenStudy (anonymous):
or addition
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OpenStudy (anonymous):
yeah
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