CCSS.Math.Content.8.EE.C.7

5(x - 3) + 2x = 27

• x = 3
• x = 15
• x = 7
• x = 6

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CCSS.Math.Content.8.EE.C.7

Find the Error
What error did the student make when solving the equation:
1/5x + 6 = 3/5x + 5
1x + 6 = 3x + 5
-2x + 6 = 5
-2x = -1
x = 1/2

• The student found an incorrect common denominator
• The student did not multiply all terms by the common denominator
• The student did not use opposite operations appropriately
• The student did not correctly eliminate the variable from one side of the equation

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CCSS.Math.Content.8.EE.C.7

Solve the literal equation for the given variable.

• (y-b)/m
• y/m - b
• y-b/m
• my/by

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CCSS.Math.Content.8.EE.C.7

x/5 - 13 = 20

• 145
• 165
• 180
• 190

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CCSS.Math.Content.8.EE.C.7

Solve:
3x + 15 = 3(x + 5)

• No Solution
• x = 15
• Infinitely Many Solutions

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CCSS.Math.Content.8.EE.C.7

Joe’s Canoes charges an initial fee of $20 plus $4 an hour. Callie’s Canoes charges a flat rate of $14 an hour. Find the number of hours for which the total amount that both places charge would be the same.

• 3 hours
• 4 hours
• 1 hour
• 2 hours

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CCSS.Math.Content.8.EE.C.7

10x + 9 = 4x - 9

• 0
• 3
• -3
• -18

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CCSS.Math.Content.8.EE.C.7

-6(1 - 6r) = -2(r + 3)

• 14
• 0
• -11
• 4

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CCSS.Math.Content.8.EE.C.7

Mike is 6 years younger than Iris. What expression can be used to find Mike’s age?

• 6 + a
• 6 - a
• a - 6
• 6a

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CCSS.Math.Content.8.EE.C.7

Solve the equation
12x - 15 = 3(2x+3)

• x = 4
• x = -4
• x = 2
• x = -2

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CCSS.Math.Content.8.EE.C.7