Substitution Assist

y = 3x
2x + y = 20

• (4, 8)
• (3, 9)
• (2, 6)
• (4, 12)

y = 2x + 1
3x + y = 16

• x = 3
• (2, 7)
• (3, 5)
• (3, 7)

y = 5x 
3x - y = 10

• (-5, -25)
• (2, 10)
• (-2, -1)
• (5, 25)

What is the solution to the system?
8x + 4y = 12
y = -2x + 3

• (0,3)
• (3,0)
• No solution(parallel lines)
• Infinitely many solutions

• infinitely many solutions
• no solution
• (0,0)
• (1,1)

x = 4y - 10
x - 2y = -4

• (4, 6)
• (2, 3)
• (3, 2)
• (6, 2)

y = -3x + 11
y = -6x - 13

• (-8, 35)
• (8, -13)
• (1, 8)
• (2, 13)

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

• (-2,5)
• (-2,-5)
• (2,-5)
• (2,5)

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

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

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

• (1,3)
• (-1,-3)
• (-1,3)
• (3,1)