Unit 7 Check for Understanding Lesson 13

2(2x + 3) + x = 3x + 18

x=

3x + 2(-x) + x + 7 = x + 3

x=

-x - (-4x) + 10 = (-x) - x

x=

-3x + x - (-x) = 10 - (-x)

x=

6 + 2 + (-4) = ​ (a)  

(-4) - (-6) + 3 = ​ (b)  

• 4
• 5
• 1
• 2
• 3
• 6
• -4
• -5
• -6
• -3

x + 3x + (-4) = -20

x=

(-10) - (-8) =​ (a)  

3 - (-7) = ​ (b)  

• -2
• 10
• -10
• 2
• 18
• -18
• 4
• -4
• -6
• -3

2x + 3(-x) -x = 2x - x + 9

x=

3(2(-x) + 1) - 4(-x) = -x + 19

x=

2(x +5) + (-4x) = -x + 20

x=