Substitution

Which equation in the system is already solved?

• First equation

• Second equation

Which equation is already solved?

• First equation

• Second equation

Which equation is already solved?

• First equation

• Second equation

Solve the system by using the substitution method

Solve the system of equations using the substitution method

Solve for x and y
y = 2x + 1
y = 4x - 1

• (1,3)
• (-1,-3)
• (-1,3)
• (3,1)

y = 5x + 1
y = 3x + 13

• (6, 31)
• (31, 6)
• (4, 21)
• (2, 11)

What is the solution to the system of equations? 
y = 3x - 8
y = 4 - x

• (3,1)
• (1,3)
• (-3,1)
• (3,-1)

What is the solution to this system of equations?

• (4, -1)
• (-1, 4)
• (-4, 1)
• (-4, -1)

What is the solution to this system?

• (1, -1)
• (-1, 1)
• (0, -2)
• (2, 0)