Vocabulary
"Math" Equations
Equations From Word Problems
Writing & Solving
100

What is the "x" called in the equation 4 + x = 17.

It's the unknown value

Variable

100
The total of r and 4 is 20.
r + 4=20
100
Ms. Castillo has m number of markers. Mr. Martinez has 25 markers. Together they have 45.
m + 25=45
100

The sum of a number (d) and 20 is 35.

d+20=35

d=15

200

What is the "+" called in the equation 4 + x = 17

Operation
200
18 is 10 increased by b.
18= 10 + b
200
Your friend has p number of pencils. You have 5 times the number pencils your friend has which is 50.
5p=50
200

The difference between a number (c) and 26 is 2.

c-26=2

c=28

300

What is the "4" called in the equation 4 + x = 17?

It's what is being added to or subtracted from the variable.

Constant

300

6 times a number m is 45

6m=45
300

5 friends share the cost (c) of dinner equally. Each person pays $12.

c/5=12

300

A number (x) divided by 2 is 14.

x/2=14

x=28

400

To solve the equation 3x = 21 you would need to use the inverse operation to undo what is happening to the variable. What is the inverse operation for this equation?

Division

400

y fewer than 100 is 15.

100-y=15
400

You have 3/4 the amount of money (m) that your friend has. You have $20.

3/4m=20 or .75m=20

400

7 times a number (y) is 14.7

7y=14.7

y=2.1

500

You are given the equation 3x=21. After you divide both sides by 3 you are left with x=7. 

What is the name for x=7? It makes the equation true.

Solution

500

A number, f, divided in half is 25

f/2=25

500

Abby spent $27.61 on her last shopping trip. $12.85 was spent on clothes while the rest (f) was spent on food. How much money was spent on food?

12.85+f=27.61  or  27.61-f=12.85

500

On a triangle all sides have the same length of e. If the perimeter of a triangle is 15in, write and solve an equation to figure out the length of each side.

3e=15in

e=5in

M
e
n
u