Elimination with Multiplication

Solve the system using Multiplication. 
2x + 3y = 12
5x - y  = 13

• x = -3, y = -2

• x = 1.5, y = 2

• x = 6, y = 0

• x = 3, y = 2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by multiplication.
2x + 10y = -20
-x + 4y = 28

• (-20,2)

• (1,4)

• (2,-20)

• (-2,2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What number should we multiply by and on which equation?
2x + 10y = -20
-x + 4y = 28

• bottom, 2

• bottom, -2

• top, -1

• top, -2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

10y-11x=-4

-2y+3x=4

• (2,2)

• (4,4)

• (4,8)

• (3,2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

2x+3y=20

-x+.5y=2

• (2,6)

• (3,6)

• (2,5)

• (3,5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

-9x+4y=6

-3x+2y=6

• (2,6)

• (3,4)

• (5,8)

• (9,6)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

-5y+8x=-18

57y+2x=58

• (2,11)

• (7,6)

• (3,6)

• (4,10)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

-3x+12y=30

-9x+6y=30

• (-6,-4)

• (-6,8)

• (-8,-4)

• (6,4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system:

x + 6y = 17

-x + 3y = -8

• (5, 2)

• (11, 1)

• (1, 11)

• no solution

Tags

CCSS.8.EE.C.8B

What do you have to multiply the first equation by to have the x's be opposite and the same?

• 3

• 2

• -2

• -3

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6