03.15.2024 Weekly Summative: Solving Equations

Take out scrap paper and solve: 4x + 6 = 18.

Show all work. No work means no credit.

Tags

CCSS.7.EE.B.4A

To undo an operation, you must do its opposite or inverse to both sides of the equation. Match each operation to its inverse.

• Division

• Subtraction

• Multiplication

• Addition

• Addition

• Multiplication

• Subtraction

• Division

4 = 4m - 2m

Show all work. No work means no credit.

• 0

• 2

• -6

• -16

1 = 6x + 2 - 7x

Show all work. No work means no credit.

• -12

• 1

• -11

• 10

-5(1 - 8n) - 4n = -221

Show all work. No work means no credit.

• 12

• -13

• 6

• -6

8(1 + 5n) + 8 = -144

Show all work. No work means no credit.

• 5

• 14

• -9

• -4

What is the final answer to

1 + 4n = 1 - 8n - 6n ?

Show all work. No work means no credit.

• 12

• 5

• 0

• -15

What is the final answer to

-4(b - 2) = -3 + 7b

Show all work. No work means no credit.

• 2

• -10

• 1

• -3

Describe the solution set:
2(x + 5) = 2x + 5

Show all work. No work means no credit.

• one solution
• no solution
• infinitely many solutions
• two solutions