Checking Equations

Which is the correct solution and explanation for:

2x -2= 10

• x=12

  2(12)-2=10

  24-2=10

• x=6

  2(6)-2=10

  12-2=10

• x=6

  2x-2=6

• x=6

  2(6)-2=10

  8-2=6

• x=7

  2(7)-2=10

  14-2=10

Tags

CCSS.7.EE.B.4A

Which is the correct solution and explanation for: 2(x -7)= -4

• x=5

  2(5-7) = -4

  2(-2)= -4

• x=9

  2(9-7) = -4

  2(2)= -4

• x= -5

  2(-5-7) = -4

  2(-12)= -4

Tags

CCSS.7.EE.B.4A

Which is the correct solution and explanation for:

3(x -7)+3x= 9

• x=5

  3(5-7) +3(5)=9

  3(-2) + 15=9

  -6+15=9

• x=0

  3(0-7) +3(0)=9

  3(-7) + 0=9

  -21+0=9

• x=-5

  3(-5-7) +3(-5)=9

  3(-12) -15=9

  -36 -15=9

Tags

CCSS.8.EE.C.7B

Which is the correct solution and explanation for: 2x = 14

• x=7

  2(14)=7

• x=7

  14-7=(7)

• x=7

  (14)/7=7

• x=7

  2(7)=14

• x=7

  2(7)=7

Tags

CCSS.6.EE.B.7

Find the solution to the system of equations: 4x - 3y = 5 and 2x + 7y = 1

• x = 2, y = -1

• x = -1, y = 2

• x = 5, y = 3

• x = 3, y = 4

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Find the solution to the system of equations: 4x - 3y = 5 and 2x + 7y = 1

• x = 2, y = -1

• x = -1, y = 2

• x = 5, y = 3

• x = 3, y = 4

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the given pair of linear equations

• x=a + b

  y=-2ab/(a +b)

• x=a -b

  y=2ab/(a-b)

• x=a- b

  y= -2ab/(a-b)

• x=a +b

  y= 2ab/(a +b)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which is the correct solution for (solve by checking answers: 2(4x - 8 )+3= 67

• x=5

• x=0

• x=10

Tags

CCSS.7.EE.B.4A

Which is the correct solution for (solve by checking answers: 2x -5 = 2(x - 5)

• no solution

• x=0

• All real numbers (check 1 and 0)

Tags

CCSS.8.EE.C.7A

Which is the correct solution for (solve by checking answers: 4x - 4 = 2(2x - 5) + 6

• no solution

• x=0

• All real numbers (check 1 and 0)

Tags

CCSS.8.EE.C.7A