Substitution
Elimination
Using "+/-"
100

y= x + 5

3x + y = 25

What is (5, 10)?

100

4x + 6y = 32

3x - 6y = 3

What is (5, 2)?

200

x - y = 1

3x = 3y + 3

What is infinitely many?

200

-4x + 5y = 17

4x + 6y = -6

What is (-3, 1)?

300

3x + y = -5

6x + 2y  = 10

What is no solution?

300

4x + 3y = 6

3x + 3y = 7

What is (-1, 3 1/3)?

400

2x + y = 4

-2x + y = -4

What is (2, 0)?

400

3j + 4k = 23.5 

8j - 4k = 4

What is (2.5, 4)?

500

y = 4x + 5

2x + y = 17

What is ( 2, 13)?

500

1/2x + 2/3y = 2 3/4

1/4x - 2/3y = 6 1/4

What is (12, -4 7/8)?

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