Show:
y=
Elimination
Substitution
Combination
More Challenging Problems
100

y=-3x+4

y=3x-2

What is (1,1).

100

-7x+4y=-20

4x-4y=0

What is (-8, -8).
100

y=-5

5x+4y=-20

What is (0,-5).

100

x-y=3

7x-y=-3

What is (-1,-4).

100

8x-6y=-20

-16x+7y=30

What is (-1, 2). 
200

y=4x-9

y=x-3

What is (2,-1).

200

7x+2y=-19

-x+2y=21

What is (-5, 8).

200

6x+8y=-22

y=-5

What is (3, -5).

200

4x+y=2

x-y=3

What is (1, -2).

200

6x-12y=24

-x-6y=4

What is (2, -1).

300

y=x+2

y=3x-2

What is (2,4).

300

4x-y=20

-2x-2y=10

What is (3, -8).

300

3x-5y=17

y=-7

What is (-6, -7).

300

4x+2y=10

x-y=13

What is (6, -7).

300

-4y-11x=36

20=-10x-10y

What is (-4, 2).

400

y=x+2

x=-3

What is (-3,-1).

400

-8x-10y=24

6x+5y=2

What is (7, -8).

400

5x+4y=-7

-5x-2y=1

What is (1, -3).

400

x+7y=0

2x-8y=22

What is (7, -1).

400

-16y=22+6x

-11y-4x=15

What is (-1, -1).

500

y=3x-1

y=3x-1

What is infinite solutions. 

500

-7x+2y=18

6x+6y=0

What is (-2, 2).

500
(-5/7)-(11/7)x=-y

2y=7+5x

What is (-3, -4).

500

-9+5y=-4x

-11x=-20+9y

What is (1, 1).

500

0=-2y+10-6x

14-22y=18x

What is (2, -1).