solve systems with substitution and elimination

Because the first equation is solved for y, we will use substitution.

Which of the following represents the correct equation when you substitute y into the equation?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

•  Infinitely many solutions

•  No Solutions

•  6

• (3,6)  

•   (6,3)

•  Infinitely many solutions

•  No Solutions

Tags

CCSS.HSA.REI.C.9

What can be done to one of the equations below in order to be able to eliminate a variable?

4x + 3y = 22

2x -y = -14

• Multiply the first equation by 4

  Multiplica la primera ecuación por 4

• Multiply the first equation by 3

  Multiplica la primera ecuación por 3

• Multiply the second equation by 4

  Multiplica el segundo ecuación por 4

• Multiply the second equation by 3

  Multiplica el segundo ecuación por 3

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What can be done to one of the equations below in order to be able to eliminate a variable?

6x + 4y = 14

-9x - 8y = -25

• Multiply the first equation by 6

  Multiplica la primera ecuación por 6

• Multiply the first equation by 2

  Multiplica la primera ecuación por 2

• Multiply the second equation by 6

  Multiplica el segundo ecuación por 6

• Multiply the second equation by 2

  Multiplica el segundo ecuación por 2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• (5, 8)

  x=5

  y=8

• (-5, 8)

  x= -5

  y= 8

• (2, 8)

  x=2

  y=8

• (-2, 8)

  x= -2

  y=8

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6