Substitution or Elimination

What is the solution to this system?
2x + 3y = 4
y= 5x - 27

• (5,-2)

• (5, 2)

• (2,3)

• (3,2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by substitution.
 
5x + 4y= −14
y =  −7x  −  15 

• (-2, -1)

• (1, -2)

• (-2, 1)

• (-1, -2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

x - 3y = -13
4x + 2y = 4

• (1, 4)

• (-1, -4)

• (-1, 4)

• (1, -4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

3x + 2y = 16
7x + y = 19

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

3x + 2y = 8
-x + y = -11

• (-5,6)

• (6,-11)

• (-6,-5)

• (6,-5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

7x - 5y = -24
-9x + 5y = 18

• (3, 9)

• (-3, -5/3)

• (3, 11)

• (3, -11)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the solution to this system? Solve by substitution.
y= 4x + 3
2x - 3y = 21

• (3,-9)

• (-3,-9)

• (-3,9)

• (0,1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What does it mean to substitute?

• to remember

• to replace or to plug in

• to get rid of or to take away

• to connect the dots

Tags

CCSS.6.EE.A.2C

Solve by using substitution method.

• (2, 7)

• (0, 1)

• (2/5, 9/5)

• (2, 5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by using elimination method.

• (3, 1)

• ( 5, -5)

• (2, 5)

• (15, 1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6