Solving Systems by Substitution

y = 2

x + y = 6

• ( 2 , 4 )

• ( 4 , 2 )

• ( -2 , -4 )

• ( - 4 , - 2 )

• ( 4 , 2 )

x = 5

x + y = 12

• ( 3 , 8 )

• ( 6 , 10 )

• ( 5 , 7 )

• ( 4 , 3 )

x = -2

x + 3y = 4

• ( 3 , -4 )

• ( -2 , 2 )

• ( -2 , -2 )

• ( -4 , 3 )

y = 5

- 3x + 4y = 8

• ( 8 , 5 )

• ( 3 , 5 )

• ( 5 , 7)

• ( 4 , 5 )

y = 3x -4

4x + 3y = 1

• ( 2 , -2 )

• ( 1 , -1 )

• ( -1 , 1 )

• ( -2 , 2 )

y = x - 4

-4x - 6y = -16

• ( -4 , 0)

• ( 0 , 4 )

• ( 0 , 0 )

• ( 4 , 0 )

x = 3y + 1

2x + 4y =12

• ( 4 , 1 )

• ( 1 , 4 )

• ( 5 , 2 )

• ( 2 , 5 )

x = y - 4

-2x + 3y = 6

• ( 2 , 6 )

• ( -2 , -6 )

• ( -6 , -2 )

• ( 6 , 2 )

What's your RTI Teacher's name?

• Ms. Dewitt

• Ms. Bulic

• Ms. Chebbi

• Ms. Rothwell

• Mr. Barrientos

Next week your math teacher is giving a chapter test. The test will consist of 35 questions. Some problems are worth 2 points and some problems are worth 4 points. There are 20 questions worth 2 points. How many problems of 4 points are on the test ?

• 18

• 17

• 15

• 16