25-11-2014
Mathematics

Answered

Which ordered pair is the solution to the system of equations?

2x-5y= -5

x+2y= 11

A(3,4)
B(5,3)
C(7,2)
D(15,7)

Verified Answer :

25-11-2014

\(\left \{ {{2x-5y=-5} \atop {x+2y=11\ |\cdot-2}} \right. \\\\ \left \{ {{2x-5y=-5} \atop {-2x-4y=-22}} \right. \\+------\\\\-9y=-27\ \ \ |:-9\\y=3\\\\x+2\cdot3=11\\x+6=11\\x=11-6\\x=5\\\\Answer\ B(5,3)\)

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