Miscellaneous
A letter used to represent an unknown number
variable
2k + 5 = 17
k = 6
3a - 5 = 4
a = 3
m/5 + 4 = 6
m = 10
z/6 - 8 = 2
z = 60
The inverse operation of addition
subtraction
2a + 11 = 35
a = 12
5m - 7 = 23
m = 6
y/8 + 11 = 13
y = 16
y/4 - 5 = 5
y = 40
The inverse operation of multiplication.
division
2r + 39 = 65
r = 13
6k - 5 = 43
k = 8
k/3 + 6 = 12
k = 18
z/6 - 4 = 3
z = 42
The four basic mathematical operations
addition, subtraction, multiplication, and division
-2s + 7 = 11
s = -2
-4j - 2 = 14
j = -4
g/11 + 37 = 128
g = 1001
y/3 - 18 = -6
y = 36
A number in front of a variable.
coefficient
-b + 14 = 4
b = 10
-2q - 3 = -1
q = -1
w/10 + 5 = 65
w = 600
d/10 - 84 = -64
d = 200