Int Algebra Mini Quiz 10/1

Solve this equation for the variable x.

x - 8 = -5

• 13

• -13

• 3

• -3

Solve this equation for the variable c.

3c + 5 = 23

• c = 3

• c = 6

• c = 7

• c = 18

Solve this equation for the variable x.

• x = 20

• x = 7

• x = 10

• x = 3

Solve this equation for the variable x.

-5x = 25

• x = 20

• x = -20

• x = -5

• x = 5

In the equation

x + 7 = 12

7 is being added to the variable, x.

How should you show your work to isolate the variable and solve the equation?

• Subtract 7 from both sides. The solution is x = 5.

• Add 7 to both sides.

  The solution is x = 19.

• Multiply both sides by 7 The solution is x = 84.

 $\frac{x}{3}+5=11$  

Solve this equation for the variable x.

• x = 18

• x = 2

• x = 48

• x = 5

 $\frac{x\ +\ 1}{4}=12$  

Solve this equation for the variable x.

• x = 2

• x = 4

• x = 49

• x = 47

Why can't we add a number only on one side of the equation?