One Variable Equations

-3 = 9 + 2x

• x = 6

• x = -6

• x = -3

• x = 3

The sum of a number x and 4 equals 12. Choose the Correct equation.

• x + 4 = 12

• 4x = 12

• 12 + 4 = x

• 12x = 4

FUNDRAISING Students and faculty raised $6042 for band uniforms. The faculty raised $1780. Write an equation you can use to fi nd the amount a raised by the students.

• 1780 - a = 6042

• 6042 / 1780 = a

• 6042 = 1780 + a

• 6042 - a = 1780

n + 7 = 9 
n = ?

• 6

• 2

• 16

• 63

 k + 6 = 18 
k = ______

• 12

• 24

• 108

• 1

A ____________ of an equation is a value that makes the equation true.

• range

• variable

• dependent

• solution

s − 68 = 11; s = 79

• yes

• no

40 = 4y
y = ________

• 160

• 44

• 10

• 36

A theater has 1200 seats. Each row has 20 seats. Write and solve an equation to find the number of rows in the theater.

• 20 * 1200 = x

• 1200 / x = 20

• 20 / 1200 = x

• 1200 / 20 = x

18 > 12 + x
What is a possible value for x

• 6

• 8

• 3

• 10