Solving systems of equations by elimination

Front

Solve by elimination:
4x+9y=28
-4x-y=-28

Back

(7,0)

Front

Solve by elimination:
3x+7y=23

-3x-7y=-17

Back

No solution

Front

Solve by elimination:
-9x-4y=-20

5x+4y=4

Back

(4,-4)

Front

Solve by elimination:
7x+y=-9

-3x-y=5

Back

(-1,-2)

Front

Solve by elimination:
-x+2y=17

2x+2y=-10

Back

(-9,4)

Front

Solve using Elimination.
4x + 8y = 20
-4x + 2y = -30

Back

(7,-1)

Front

4x + 8y = 20
-4x + 2y = -30
Which variable will be eliminated?

Back

The x

Front

Solve using elimination.
4x + 8y = 20
-4x + 2y = -30

Back

(7,-1)

Front

-5x + 5y = -5

x - 5y = -7

Back

(3, 2)

Front

2x + 4y = 0

-5x - 4y = 18

Back

(-6, 3)