Systems of Equations (Elimination by Addition)

• (-1,10)
• (10,-1)
• (10,1)
• (1,10)

• (1,3)
• (2,3)
• (-1,3)
• (-2,3)

• (3,9)
• (6,9)
• (3,-9)
• (6,-9)

When we add the equations together, one variable (one column) is _______.

• eliminated

• selected

• graphed

• substituted

• (9,8)
• (9,7)
• (9,6)
• (9,5)

What is the best first step to solve this system by elimination?

• Add the equations to eliminate y

• Multiply the first equation by 2

• Add the equations to eliminate x

What is the best first step to solve this system by elimination?

• Add the equations to eliminate y

• Multiply the first equation by 2

• Multiply the second equation by 2

• Add the equations to eliminate x

Solve the system by the elimination method.

• (-1,-1)
• (1,1)
• (3,3)
• (-3,-3)

• (4,1)
• (1,4)
• (3,9)
• (9,3)