solving Equations

What is the first step in solving this equation:
5x + 7 = 12

• Divide by 5
• Subtract 5
• Multiply by 7
• Subtract 7

Tags

CCSS.7.EE.B.4A

Find the error in the problem below
19 - 2k = 3k - 1
     +3k   +3k
19 + 1k = -1
-19           -19
k = -20

• They should have divided by 1 for the last step
• They should add 19 instead of subtracting 19
• I can not find an error
• Instead of adding 3k they should subtract 3k

Tags

CCSS.HSA.REI.A.1

Is the solution below correct?
-6z + 13 = 7z
+6z           +6z
13 = 13z
z = 1

• Yes
• No

Tags

CCSS.HSA.REI.A.1

WRITE AN EQUATION
You bought a magazine for $5 and four
erasers. You spent a total of $29. How
much did each eraser cost?

• 5 + x = 29
• -5 - 4x = -29
• 5x = 29
• 29 - 5 = -4x

Tags

CCSS.HSA.CED.A.3

Mary earns $14 per hour. Which equation represents how many hours she worked to earn $112? 

• 14h = 112
• 14 / h = 112
• h + 14 = 112
• h - 14 = 112

Tags

CCSS.HSA.CED.A.3

WRITE AN EQUATION
Aliyah had $24 to spend on seven pencils. After buying them she had $10. How much did each pencil cost?

• 24 - 10 = -7x
• 24 - 7x = 10
• -24 - 7x = -10
• 10 + x = 24

Tags

CCSS.HSA.CED.A.3

Solve:
2x + 1 = 2x - 1

• No Solution
• x = 0
• Infinitely Many Solutions

Tags

CCSS.8.EE.C.7A

Determine the type of solution you will have if you get
-5=-5

• one solution
• infinite solution=identity
• no solution
• I don't know.  I need to study.

Tags

CCSS.8.EE.C.7A

Determine the type of solution you will have if you get
-6=6

• one solution
• infinite solution=identity
• no solution
• I don't know.  I need to study.

Tags

CCSS.8.EE.C.7A

What is the solution to the equations?

• one solution
• no solution
• infinite solutions
• none of these

Tags

CCSS.8.EE.C.7A