Introduction to Elimination

How do we begin solving this system of equations using the elimination method. Use your notes if necessary.

• Subtract the two equations

• Multiply one equation by -1 and then subtract the equations

• Multiply the first equation by the second x (or y) coefficient, multiply the second equation by the first x (or y) coefficient, then subtract the equations

How do we begin solving this system of equations using the elimination method. Use your notes if necessary.

• Subtract the two equations

• Multiply one equation by -1 and then subtract the equations

• Multiply the first equation by the second x (or y) coefficient, multiply the second equation by the first x (or y) coefficient, then subtract the equations

How do we begin solving this system of equations using the elimination method. Use your notes if necessary.

• Subtract the two equations

• Multiply one equation by -1 and then subtract the equations

• Multiply the first equation by the second x (or y) coefficient, multiply the second equation by the first x (or y) coefficient, then subtract the equations

How do we begin solving this system of equations using the elimination method. Use your notes if necessary.

• Subtract the two equations

• Multiply one equation by -1 and then subtract the equations

• Multiply the first equation by the second x (or y) coefficient, multiply the second equation by the first x (or y) coefficient, then subtract the equations

Solve using Elimination Method:

4x + 9y = 28

-4x - y = -28

• (-7,0)

• (6,0)

• (-6,0)

• (7,0)

• (6,7)

4x+ 9y = 28

-4x -y = -28

• (-7,0)

• (6,0)

• (-6,0)

• (7,0)

• (6,7)

Solve the system:

x + 6y = 17

-x + 3y = -8

• (5, 2)

• (11, 1)

• (1, 11)

• no solution

4x+8y=20

-4x+2y=-30

• (-7,1)

• (2,-5)

• (-2,5)

• (7,-1)

Solve for y.

(just the number)

Mathematical Equivalence

ON

Solve for x.

(just the number)

Mathematical Equivalence

OFF