Algebra I Tek A.6A

Solve the System by Substitution:

y=2x

5x - y = 9

• (3, 6)

• (11, 5)

• (-3, 6)

Solve the System by Substitution:

x= 3y

2x + 4y= 10

• (0, 0)

• (3, 1)

• (1, 3)

How would you Solve the System by Substitution?

x- 2y = 3

4x - 8y = 12

• 4 ( 2y) - 8y = 12

• 4x - 8(x + 3) = 12

• 4(2y + 3) - 8y = 12

Solve the System by Substitution:

x - 2y= 1

3x - 6y = 3

• NO SOLUTION

• (3, 3)

• MANY SOLUTIONS

Solve the System by Substitution:

y = -5

8x + 5y = -17

• NO SOLUTION

• (1, -5)

• (8, 1)

Solve the System by Substitution:

3x - 5y= 15

x - 4y = 12

• NO SOLUTION

• (3, 0)

• (0, -3)

Solve the System by Substitution:

y = 7x + 6

4x - 3y = 16

• (2, 8)

• (-2, -8)

• Many Solutions

This system has _____ solutions

• 0
• 1
• 2
• Infinitely many

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

• (-2,5)
• (-2,-5)
• (2,-5)
• (2,5)

- 3x + y = -8
  x + y  = 4

• (3, 1)
• (1, 3)
• (3, -1)
• (-3, 1)