Solve by the substitution method.
-$x+y=9$
$2 x+2 y=18$
A) $(0,0)$
B) Infinite number of solutions
C) $(9,0)$
D) $(9,2)$

Name: Solve by the substitution method. -$x+y=9$ $2 x+2 y=18$ A) $(0,0)$ B) Infinite number of solutions C) $(9,0)$ D) $(9,2)$
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Quizplus · Accepted Answer

The second equation is simply the first equation multiplied by 2, meaning they represent the same line. Therefore, there are infinitely many solutions as the system does not have a unique solution.

Solve by the Substitution Method x+y=9x+y=9x+y=9 2x+2y=182 x+2 y=182x+2y=18 A) (0,0)(0,0)(0,0) B) Infinite Number of Solutions C)

Solve by the Substitution Method $x+y=9$ $2 x+2 y=18$ A) $(0,0)$ B) Infinite Number of Solutions
C)