Equivalent Algebraic Expressions

Which of the following expressions shows 7 subtracted from the sum of a number and 3?

• 7 - 3n

• 7n + 3

• n - 7 + 3

• (n + 3) -7

Which is the coefficient in the expression 5n + 6 - 2?

• n

• 2

• 5

• 6

A stadium has a total of  18,000 seats.  Of these, 7,500 are field seats, and the rest are grandstand seats.  Write an equation that could be used to find the number of grandstand seats s. 

• 18,000 + 7,500 = s

• s + 7,500 = 18,000

• 7,500 - s = 18,000

• 7,500 - 18,000 = s

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 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

a letter that represents a number

• coefficent

• variable

• constant

• letters

a numerical quantity placed before the variable in an algebraic expression

• constant

• operation

• coefficient

• inequality

a symbol or a combination of symbols used in algebra, containing one or more numbers, variables, and arithmetic operations. (no equal sign)

• variable

• numerical expression

• algebraic expression

• coefficient

when a number is next to a variable in an equation the operation is

• multiplication

• addition

• depends

• division

when two numbers, equations, or expressions are equal

• equation

• equivalent

• equalision

• variable