Answered

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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)

Sagot :

luana
[tex] \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)[/tex]
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