Solve Operations and Algebraic Thinking

Solve:

n - 5 = 20

• 15

• -15

• 25

• -25

Solve:

n + 10 = 2

• 12

• 8

• -12

• -8

A number plus 8 results to 20. What is the number?

• 12

• 28

• -12

• -28

I am thinking of a number from 1 to 20. If the number is decreased by 7, the result is 10. What is the number?

• 13

• 3

• 17

• 10

19  + a  =  -50

• a = -950

• a =  -69

• a = -31

• a = -50/19

x - 8 = -5 

• 13

• -13

• 3

• -3

Which equation has x = 5 as the solution?

• x + 15 = 10

• 2x = 5

• 2x = 10

What equation matches this situation?
Robyn had some video games then bought 4 more.  Now she has a total of 10 games.

• v - 4 = 10

• v + 4 = 10

• 10 - 4 = v

• Answer not Given

x - 62 = 123
How should you show your work to isolate the variable and solve the equation?

• Add 62 to each side. 

• Subtract 62 from each side.

• Multiply each side by 62.

• Add 123 to each side.

What is the inverse operation needed to solve for p?765 = p - 254

• subtract 254

• add 254

• multiply 254

• divide 254