Solving System of Equations in Two Variables Using Elimination or Substitution

Solve the system of equations.
y = 4x + 1
3x + 2y = 13

• (1, 5)

• (5, 1)

• (0.25, 2)

• ∅

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which method would be best (quickest) for solving the system below:
3x - 4y = -2
y = 2x + 1

• Substitution

• Elimination

• Graphing

• None

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which choice shows substitution correctly?

• 2x + 4(3y - 7) = 9

• 2(3y -7) + 4y = 9

________________

are two or more equations that have the same variables and work together.

• graphing lines

• elimination method

• system of equations

• table

• slope intercept form

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve by elimination 
5x+6y= -10
3x-2y= -6

• (-2,0)

• (0,-2)

• (2,0)

• (0,2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the following equations by substitution:
y=-x
y= -2x-1

• infinite solutions

• (-1, 1)

• (1, -1)

• (-1,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the following system by substitution:
y= 2x-4
2y+6= 6x

• (-1, -6)

• (1, -2)

• (-1,-4)

• (-4, -12)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by elimination:
7x+y=6
10x+y=12

• (1,-1)

• (2,8)

• (2, -8)

• (1, 15)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve: Use Substitution

8x + 4y = 12

y = -2x + 3

• (0,3)

• (3,0)

• No solution(parallel lines)

• Infinitely many solutions

Tags

CCSS.8.EE.C.8B

 4x + 8y = 20
-4x + 2y = -30

• (-7,1)

• (2,-5)

• (-2,5)

• (7,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6