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OpenStudy (anonymous):
Which value of x satisfies both 3x + y = 9 and 3x − 5y = 15? 103 23 −1 0
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OpenStudy (anonymous):
subtract the equations
OpenStudy (anonymous):
thanks
OpenStudy (kidrah69):
\[ 3x + y = 9 \] \[ -( 3x − 5y = 15)\] We want opposite signs so that the terms will cancel out :) \[3x + y = 9 \] \[ - 3x + 5y = -15)\]
OpenStudy (kidrah69):
Everything cancels out so what would x=?
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