Substitution and Elimination

Solutions

100

Is (3,4) a solution to

−4x−3y=−21

x=y

What is no?

200

Is (1, 7) a solution to 

y=4x+3

y=7x

What is yes?

300

Is (9,−2) a solution to

−x+3y=−15

3x+3y=21

What is yes?

400

The number of solutions to 

5x+y=−3

-5x-y=3

What is infinitely many solutions?

500

The number of solutions to

−x+2y=−7

-4x+8y=−28

What is infinitely many solutions?

Elimination

100

10x−2y=18

−10x+9y=−46

What is (1, -4)?

200

-10x-9y=10

8x+9y=10

What is (−10,10)?

300

2x−3y=−14

5x+9y=−2

What is (−4,2)?

400

x−2y=9

-6x+4y=−46

What is (7,−1)?

500

-4x-4y=0

7x+5y=10  

What is (5,−5)?

Substitution

100

y=−6x

y=−4x+4

What is (−2,12)?

200

y=−7x

y=4x+22

What is (-2, 14)?

300

−2y=x

7x+9y=−45

What is (-18, 9)?

400

−6x−8y=50

x=−3y

What is (-15, 5)?

500

10x+7y=−41

-4x+7=y

What is (5,−13)?

Mixed

100

y=6x+10

y=4x

What is (-5, -20)?

200

x=9y

2x-2y=−16

What is (-9, -1)?

300

−4x+3y=−21

-2x-3y=3

What is (3, -3)?

400

−5x+9y=11

x-3y=−7

What is (5, 4)?

500

−4x+6y=−10

2y+4=x

What is (−2,−3) ?

Potpourri

100

2/3 * 1/5

What is 2/15?

200

Simplify 4 - x² - x + 1 + 4x

What is -x² + 3x + 5 ?

300

Solve 

−4x+5=−8x+21

What is x=4?

400

Solve

−2(−x+1)+3x+3=26

What is x=5?

500

The slope between the points (−1,6) and (14,3)

What is -1/5?