Solve the system of linear equations by elimination.
-9x - 2y = 72
-18x + 6y = 54
A) (6, 9)
B) (9, 6)
C) (-9, -6)
D) (-6, -9)

Question

Quizplus · Accepted Answer

To solve by elimination, multiply the first equation by 3 to align the coefficients of y:  -27x - 6y = 216  -18x + 6y = 54  Add the equations:  -45x = 270  x = -6  Substitute x = -6 into the first equation:  -9(-6) - 2y = 72  54 - 2y = 72  -2y = 18  y = -9  The solution is (-6, -9).

Solve the System of Linear Equations by Elimination