Solving Systems by Elimination

Look at the system below. Is the x & y lined up?

$$3x=4y-7\$$  

$$3x+7y=11$$  

Is the System Lined up?

$$4y\ -\ 3x=12$$  

$$y+3x=0$$  

Are any of the coefficients same or opposite?

2x - 6y = 20

2x + 5y = -11

Are any of the coefficients same or opposite?

5x - 2y = 11

-10x + 3y = -4

Are any of the coefficients same or opposite?

x - y = 11

2x + y = 19

Are any of the coefficients same or opposite?

4x+ 9y = 28

-4x -y = -28

Solve the system:

x + 6y = 17

x + 3y = -8

9x-3y=-3

-5x+3y=-1

Would you add or subtract to eliminate the variable (Get ZERO)

10x-8y=-30

-10x+9y=25

Would you add or subtract to eliminate the variable (Get ZERO)

Would you add or subtract to eliminate the variable (Get ZERO)

x + y = 3

x - 10y = -30

Would you add or subtract to eliminate the variable (Get ZERO)

-10x-9y=9

10x+7y=-7

Would you add or subtract to eliminate the variable (Get ZERO)

-2x+7y=0

2x+7y=-16

Which variable will be eliminated?

4x+9y=28

4x-y=-28

Which variable will be eliminated

3x+7y=23

-3x-7y=-17

Which variable will be eliminated?

-9x+4y=-20

5x+4y=4

Which variable will be eliminated

7x+y=-9

-3x-y=5

Which variable will be eliminated?

4x+4y=4

3x+4y=10

Which will be eliminated?

-x+2y=17

2x+2y=-10