Substitution System of Equations

• Infinitely Many Solutions
• No Solution

Which is the best method for solving this system of equations?

• Substitution

• Equal Values

• Elimination

Which is the best method for solving this system of equations?

• Substitution

• Elimination

• Equal Values

Solve the system of equations using substitution:

-4x + 4y = 8

y = -2x - 10

• (-4, -2)

• (12, -34)

• (4, -18)

• (-2, -6)

• (-4, 6)

Solve for x and y (Use Substitution)

y = 2x + 1

y = 4x - 1

• (1,3)

• (-1,-3)

• (-1,3)

• (3,1)

• (1,1)

Solve using Substitution Method

y = -6

-3x - 6y = 24

• (6, 6)

• (6, -6)

• (4, -6)

• (-6, 4)

Solve the system using substitution.

• (1, 2)

• (4, 1)

• (2, -1)

• No Solution

Solve the system of equations:
y=2x
x + y = 9

• (6, 3)

• (3, 6)

• (-3, -6)

• no solution

y = x - 9 
y = -9

• 0, -9

• -1, 2

• -18, -9

• -81, -3

Solve for x and y using the substitution method.

5x + 3y = 7

y = 4

• (4,1)

• (4,-1)

• (1,4)

• (-1,4)