adding one step equations
a-3 = 8
11
a - 5 = 4
9
What is the term for a letter that represents an unknown number.
variable.
5a = 25
5
a/7 = 9
63
a + 8 = 92
84
a - 21 = 49
70
What is the inverse (or opposite) operation of addition?
subtraction
10a = 100
25
a/8 = 12
76 = a + 21
55
300 = a - 180
480
What is the inverse (opposite) operation of multiplication?
division
86 = 2a
43
15 = a/10
150
30 = a -120
150
a - 1 820 = 980
2 800
What does this mean?
5x
multiplication - 5 multiplied by a number
4a = 144 (hint: use long division...)
36
13 = a/8
104
23 = a + 9
14
4 = a - 28
32
What is the name of the number next to a variable?
ex. 3x
coefficient
126 = 6a (hint: use long division...)
21
14 = a/12
168