Ticket out the Door


1. Choose the equation that is equivalent to 2.3 - w = 7.8

a. w - 2.3 = 7.8

b. w - 2.3 = -7.8

c. -w = -5.5

 

2. Write three equivalent equations.

 

3. Explain how you can prove that 4.5 is the solution of x - 1.2 = 3.3

 

4. Complete: If x - 6 = 21, then x + 7 = ??. Explain your reasoning.

 

Solve each equation.

5. m + 10 = 7

 

6. (1/6) - n = 2/3

 

7. d - (-27) = 13

 

8.5.7 + a = -14.2

 

Define a variable, write an equation, and solve each problem. Then check your solution.

9. Thirteen subtracted from a number is -5. Find the number.

 

10. A number increased by -56 is -82. Find the number.

 

 

 


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