adding one step equations
a + 3 = 8
a - 5 = 4
9
Sam's mom gave him marbles for his birthday. He lost 13 marbles. Now he has 24. How many did his mom give him? (Subtraction equation)
x - 13 = 24
x - 24 = 13
5a = 25
5
a/7 = 9
63
a + 8 = 92
84
a - 21 = 49
70
Wendy owes Tim money. She will pay him $8 a week for 6 weeks. Write an equation. (Division)
x/8 = 6
x/6 = 8
25a = 100
4
a/8 = 12
a + 21 = 76
55
a - 180 = 300
480
Mr. Smith has 90 textbooks. He has to give 6 books to each classroom. How many classrooms does he have to give books to?
6x = 90
8a = 72
9
a/10 = 15
150
a +30 = 120
90
a - 100 = 870
970
Jim went for a jog. While running, $1.35 fell out of his pocket. When he got home, he only had $2.55 left. How much money did he start with?
x - 1.35 = 2.55
10a = 1250
125
a/8 = 13
104
a + 9 = 23
14
a - 28 = 4
You brought money to school. You spent $4 at the snack cart, your friend paid you back $8, and you lost $2 at ROAR. Now you have $32. How much money did you have at the start of the day?
$30
x - 4 + 8 - 2 = 32
Use inverse operations to solve backwards.
14a = 112
8
a/12 = 4
48