Solving Systems of Equations

What is the proper way to begin solving by SUBSTITUTION?

y = 6x − 11

−2x − 3y = −7

• -2(-11) -3y= -7

• -2(6x-11) -3y = -7

• -2x -3(11) = -7

• -2x - 3(6x-11)= -7

When solving this system by ELIMINATION, which variable will be eliminated?

4x + 8y = 20

−4x + 2y = −30

• X because they are opposites

• Y because they are even

Match the solution to the system of equations.

• (-4, -1)

• 
• (2, -1)

• 
• (1, 4)

• 
• (-2, -1)

• 

What is the proper first step when solving by SUBSTITUTION?

-7x -2y= -13

x = 2y+11

• -7(11) -2y = -13

• -7(2y +11)-2y = -13

• -7x -2(11) =-13

• -7x - 2(2y+11)= -13

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

• (-2,5)
• (-2,-5)
• (2,-5)
• (2,5)

Solve the system by GRAPHING

y=5x−5

y= −4x+22

• (1, 2)

• (3, 10)

• (-1, 2)

• (-3, 10)

Solve the system by SUBSTITUTION.
y = 4x+1
3x + 2y = 13

• (1, 5)
• (5, 1)
• (0.25, 2)
• ∅

Solve the system by ELIMINATION
3x - y = 7
2x + y = 3

• (-1,2)
• (5,4)
• (4,5)
• (2,-1)

Solve the system by SUBSTITUTION

y= 3x -13

2x +4y =4

• (5,2)

• (4, -1)

• (-4, -1)

• (5, -2)

• (-4, 1)

What is the solution to this system of equations?

• (4, -1)

• (-1, 4)

• (-4, 1)

• (-4, -1)