Expressions and Equations

An inverse operation is

• reversing the sign in an inequality

• using the opposite operation to solve equations

• A number’s distance from zero

Choose an expression that is equivalent to the following
6n + 2(3 - 5n)

• n + 6
• 6 - 4n
• 16n + 6

Choose the first step in solving the following equation.
-3y - 12 = 14

• add 3 from both sides
• add 12 to both sides
• subtract 12 from both sides

0.1( x - 20 ) > 2

• x > 40
• x < 40
• x > 220

• -3m + 36
• -9m + 36
• 3m + 36

What does this symbol mean?

• at least
• at most
• less than

-12x > 36

• x > -3
• x > 48
• x < -3

- 3( 4 - 2x) = 6

• x = 1
• x = -3 
• x = 3

Which expression represents the phrase below?          83 less than a number n

• 83 - n
• n - 83
• 83/n
• n/83

If n stands for the unknown number, which expression represents the phrase below?     the sum of a number and three, divided by seven

• n + (7 ÷ 3)
• (7 ÷ 3) + 3
• 7 ÷ (n + 3)
• (n + 3) ÷ 7