Elimination by Multiplication

5x + 16y = -16
-9x - 8y = 8

• (3, 1)
• (3, -1)
• (-3, -1)
• (0, -1)

14x - 9y = 1
-7x + 3y = 16

• (10, -11)
• (-10, 11)
• (-11, 11)
• (-7, -11)

Solve the system by multiplication.
3x + 2y = 16
7x + y = 19

• (-2,5)
• (-2,-5)
• (2,-5)
• (2,5)

Solve the system by elimination.  

−6x + 6y = 0
9x − 8y = 4 

• (4, −9)
  
• Infinite number of solutions 
• (−9, 4)
  
• (4, 4) 

Solve the system by elimination.  

4x + 12y = −1
−3x − 9y = 0 

• (10, 1) 
• (−10, −1) 
•  (10, −1) 
•  No solution