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

Which equation has x=9 as a solution

• 4 + x = 12
• 5x = 45
• 2x = 20
• x + 7 = 26

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

-x < -x + 7(x - 2) 

• x > -2 
• x < -2 
• x > 2 
• x < 2

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

Solve for x.

• 55
• 60
• 15
• 35

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

Solve the inequality:
x + 7 < 9 

• x < 2
• x < 16
• x < 63
• x < - 2

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

Find the Error
What error did the student make when solving the equation:
5x + 6 =  66
5x - 6 = 66 -6
5x = 60
5*5x= 60*5
x = 300

• The student subtracted 6 from both sides instead of adding
• Student multiplied by 5 instead of dividing by 5
• Student got the wrong answer when subtracting 66-6
• The student did not correctly eliminate the variable from one side of the equation

Tags

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

-16 - (-16)

• 0

• 32

• -32

• none of these options

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

Give the x-intercept
3x + 8y = 24

• (8, 0)
• (0, 8)
• (3, 0)
• (0, 3)

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

6x+3=2x-9

• x=-3
• -12
• x=-4
• x=6

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

 $-3x-6x=6+x-7x$  

•  $-3$  

•  $12$  

•  $11$  

•  $-2$  

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

Solving the formula P = 2L + 2W for W is not equivalent to which equation?

• (P-2L)/2 = W

• (P/2) - (2L/2) = W

• (1/2)P - L = W

• P - (1/2)L = W

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