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Vocabulary

100

x=12

y=68

Solution

200

-4=-4

2=2

77=77

18526=18526

infinite solution

300

-12=8

6=3

-11=44

No solution

400

What vocab word is this: 

This means replacing one variable with an equivalent expression containing the other 

Substitution Method

500

What voab word is this:

A method for solving systems of equations by using the addition and subtraction properties of Equality

Elimination Method

Equations by substitution

100

3x + y = 20

y = 5

x = 5

y =5

200

x + 2y = 200

x = y + 50

y = 50 

x = 100

300

2x+y=-1

6x=-3y-3

infinite solution

400

-3x + y = -2

y = x + 6

x = -3

y = 3

500

3x - 2y = 10

y = 3/2x - 1

no solution

Equations using elimination

100

6x - 8y = 40

5x + 8y = 48

y = 1

x = 8

200

3x + y = 20

x - y = 12

x= 4

y = 8

300

2x + 7y = -7

5x + 7y = -14

x = 7

y = -3

400

10x - 4y = 6

10x -3y = 13

y = 7

x = 1

500

8x - 2y = 58

6x - 2y = 40

x = 9

y = -7

True or False?

100

True or false.

6(2) - 3 = 3(2)

False

200

True or False?

8(10) + (-10) = 9(5) + 25

True

300

True or False?

1/2(4) + 5(9) = 45

False 

400

True or False?

3(4) + y = 20

y = 16/2

True

500

True or False?

4x + 6y = 98

y = 2x + 7

False