 ##### Print Instructions

NOTE: Only your test content will print.
To preview this test, click on the File menu and select Print Preview.

See our guide on How To Change Browser Print Settings to customize headers and footers before printing.

# Writing Algebraic Expressions and Equations (Grade 8)

Print Test (Only the test content will print)

## Writing Algebraic Expressions and Equations

Instructions: Write the expression or equation in algebraic form.

1.
3 times the quantity $m$ minus 7
1. $3(m-7)$
2. $3 xx m-7$
3. $3-m$
4. $3 xx m7$
2.
What is an algebraic expression for "3 less than the product of 2 and a number x"?
1. 2x - 3
2. (3 - 2)x
3. 3 - 2x
4. 2 - 3x
3.
two times a number plus 9
1. 2+5n
2. 2n+9
3. 29+n
4. 9n+2
4.
7 less than the product of 12 and a number
1. 12 + n - 7
2. 7 - 12 + n
3. 7 - 12n
4. 12n - 7
5.
x minus twenty divided by two times x
1. x - 20/2x
2. 2x/x - 20
3. 20 - x/2x
4. 2x/20 - x
6.
Which equation represents the sentence, "The difference of $9$ and $x$ is $5$"?
1. $9=x-5$
2. $9=5-x$
3. $9-x=5$
4. $x-9=5$
7.
The product of two numbers is 25.
1. x + y = 25
2. x - y = 25
3. xy = 25
4. x/y = 25
8.
7 divided by a number equals 14.
1. 7/14 = n
2. 14/7 = n
3. 7/n = 14
4. n/7 = 14
9.
The cost of a shirt is $11.99. When Ian pays for the shirt plus tax with a 20-dollar bill, he receives$7.30 in change. Which equation represents this situation if t is the tax on the shirt?
1. 11.99 + t = 20.00 - 7.30
2. t - 11.99 = 20.00 - 7.30
3. 11.99t = 20.00 - 7.30
4. 20.00 - 11.99t = 7.30
10.
An apartment complex charges $460 per month in rent plus a$200 annual maintenance fee. Write an equation representing the year's cost (C) for (m) months of rent.
1. C = 200m + 460
2. C = 460m - 200
3. C = 460m + 200
4. C= 200m - 460
11.
Write the expression: Four miles less than three times the original distance (d).

12.
Write the expression:

the value in cents of x quarters

13.
Write an expression for the following.

12 more than a number.

14.
Write an expression:

six times the difference of a number and 9.

15.
Write an expression to describe 8 times x plus 3.

16.
Translate the phrase to an algebraic expression, use the letter x and/or y for the variable.

Three times some number plus eleven

17.
Liza picked M mangoes. Bernad picked 75 fewer mangoes than Liza. Write an expression that shows how many mangoes Bernad picked.

18.
Write an equation for the statement. Let x represent the variable.
Two multiplied by some number is $1/2.$

19.
Write the expression: Half of a number $n$, decreased by 5.

20.
You start a car washing service. You spend $20 on supplies. You plan on charging$5 to wash each car.

Write an equation to relate your income $y$ to the number of cars $x$ you wash.

You need to be a HelpTeaching.com member to access free printables.