Solve by Substitution

y = x - 9 
y = -9

• 0, -9
• -1, 2
• -18, -9
• -81, -3

y = x + 20
y = 6x

• 4,24
• 0,24
• -4,21
• 26,0

Solve this system of equations. 
y = 2x + 1
y = 4x - 1

• (1,3)
• (-1,-3)
• (-1,3)
• (3,1)

Solve the system by substitution.
 
5x + 4y= −14
y =  −7x  −  15 

• (-2, -1)
• (1, -2)
• (-2, 1)
• (-1, -2)

3x + 2y = 8
-x + y = -11

• (-5,6)
• (6,-11)
• (-6,-5)
• (6,-5)

Solve for x and y
3x + 2y = 16
7x + y = 19

• (-2,5)
• (-2,-5)
• (2,-5)
• (2,5)

Solve for x and y.
3x+y=-5
6x+2y=10

• No Solution
• Infinite Number of Solutions
• (2,3)
• (6,-2)

What is the solution to the system?
x - 2y = 2
3x + 4y = 3

• (1.4, -0.3)
• (3.1, 5)
• (-2.5, 3.5)
• (6.9, 1.02)

If a system of equations has no solution, what does the graph look like? 

• intersecting lines
• parallel lines
• skew lines
• intersecting lines

^{What is the solution?} 

• 1
• -2
• (1, 2)
• (1, -1)