Systems of Equations Elimination Addition Subtraction

What is the solution?

• (1, -2)

• (-2, 1)

• (-4, 1)

• (2, 1)

Solve the system for y:

3x = 30

3x - 2y = 100

Mathematical Equivalence

OFF

Solve the system for y:

x - y = 10

2x + 2y = 8

Mathematical Equivalence

OFF

What method would you use to solve the following system of equations?

• solve for y

• Substitution, because there is an equation with an isolated variable

• Elimination with addition

• Elimination with multiplication

• elimination with subtraction

Which of the following represents the correct equation when you substitute y into the equation?

Solve the following system using elimination.

x+4y=(-4)

x+10y=(-16)

• (6,3)

• (4,-2)

• (-3,1)

• (-3,4)

• (4, -2)

• (-2, 4)

• (2, 4)

• (2, -4)

Find the solution to this system.

4x + 8y = 20

−4x + 2y = −30

• (-1, 7)

• (-7, 1)

• (7, -1)

• (1, -7)

• (-5, -9)

• (9, 5)

• (5, 9)

• (-9, -5)

• (1, 4)

• (4, 1)

• (1, -4)

• (-4, 1)