Big Ideas Linear Equations

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

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

• range
• variable
• dependent
• solution

s − 68 = 11; s = 79

• yes
• no

n + 7 = 9 
n = ?

• 6
• 2
• 16
• 63

 k + 6 = 18 
k = ______

• 12
• 24
• 108
• 1

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

 y = 7x + 2; (2, 0) 

• Yes
• No

a ≤ 0; a = −5

• yes
• no