One-Step +/- Equations
a + 3 = 8
5
Give me an example of a variable
any letter
5a = 25
5
a/9 = 9
81
5x4
20
x - 85 = 17
102
Define inverse operation
The opposite, signs that undo each other
25n = 625
25
a/7 = 4
28
51 + 7
58
5.38 + r = 22.3
16.92
What is the inverse operation of addition?
Subtraction
18g = 486
27
a/21 = 15
315
98 - 3
95
a + 30 = 120
90
Name the 4 operations
addition, subtraction, multiplication, division
-7k = 63
-9
a/12 = 47
564
Tim's high school played 88 football games this year. He attended 77 games. How many football games did Tim miss?
11 games
a - 112 = 1888
2000
What can you do to check your answer when solving?
Plug your answer in
.8x = 56
70
b/53 = 402
21,306
Sally has 22 books. Jason has 33 books. How many books do they have together?
55 books