09-04-2015
Mathematics

Answered

how do I solve 4x+y=0 and 5x-y=9

Verified Answer :

09-04-2015

\(\left \{ {{4x+Y=0} \atop {5x-Y=9}} \right.\)
\((4x+y=0) + (5x-y=9) \\ 9x+y-y=0+9 \\ 9x=9\)
\(x=1\)
\(4(1)+y=0\)
\(y=-4\)

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