Surprise
This is the inverse of addition.
What is subtraction?
Solve for a.
5n + 2 = 12
n=2
Solve.
2(4z - 2) = 44
z = 5
Define variable and create an equation for the word problem below.
Marvin sold newspaper subscriptions during summer break. he earned $125.00 per week plus $5.75 for each subscription that he sold. During the last week of the summer, Marvin earned $228.50. How many subscriptions did he sell that week?
x: Subscriptions Sold
125 + 5.75x = 228.50
x=18
Define variable and create an equation for the word problem below.
331 students went on a field trip. Six busses were filled and 7 students traveled in cars. How many students were in each bus?
x: # of students in each bus
6x + 7 = 331
x=54
This is the inverse of division.
What is multiplication?
Solve for z.
57 = -10z + 7
z = -5
Solve.
4(y + 4) = 32
y = 4
Define variable and create an equation for the word problem below.
Adele is paid a weekly salary of $685. She is paid an additional $23.50 for every hour of overtime she works. this week her total pay, including regular salary and overtime, was $849.50. how many hours of overtime did Adele work this week?
x: How many hours of overtime Adele worked?
685 + 23.50x =849.50
x=7
Define variable and create an equation for the word problem below.
Sumalee won 40 super bouncy balls playing horseshoes at her school's game night. Later, she gave two to each of her friends. She only has 8 remaining. How many friends does she have?
x: bouncy balls remaining
40 - 2x = 8
x=16
The number in front of the variable.
What is a coefficient?
Solve for n.
3n - 6 = 12
n=6
Solve.
3(z - 3) = 9
z = 6
Define variable and create an equation for the word problem below.
A video rental store rents a movie at $2.95 for the first night, plus $1.50 for each additional night. When you return the movie, you pay $8.95. How many additional nights did you keep the movie?
x: Nights that the movie was kept
1.50n + 2.95 = 8.95
n= 4
Define variable and create an equation for the word problem below.
Jill sold half of her comic books and then bought 16 more. She now has 36. With how many did she begin?
x: comic books she began with
x/2 + 16 = 36
x= 40
A letter in math is called
What is a variable?
Solve for x.
-48 - x = -39
x = -9
Solve.
3(3y - 10) = 6
y = 4
Define a variable and create an equation.
Your class budgets money from the class treasury for a school dance. Decorations will cost $50. The DJ charges $30 per hour. If your class has a total of $170 to spend on the dance, how many hours can you pay a DJ?
x: # of hours
50 + 30x =170
x= 4
Define variable and create an equation for the word problem below.
Aliyah had $24 to spend on seven pencils. After buying them she had $10. How much did each pencil cost?
x: cost of each pencil
24 - 7x = 10
x=2
When solving an equation, what is the goal?
To isolate the variable
Solve for n
n/5 - 3 = -7
n = -20
Solve.
-3(2x - 3) = 9
x = 0
Define variable and create an equation for the word problem below.
A family buys 4 airline tickets online. The family buys travel insurance that costs $19 per ticket. The total cost is $752. Let x represent the price of one ticket
x: The price of one ticket
4(x+19) = 752
x=169
How old am I if 400 reduced by 2 times my age is 244?
x: age
400 - 2x = 244
x = 78 years old