Miscellaneous
The opposite of multiplication
division
2k + 5 = 17
k = 6
3a - 5 = 4
a = 3
m/5 + 4 = 12
m = 40
z/6 - 8 = 2
z = 60
A letter used to represent an unknown number
variable
2a + 11 = 35
a = 12
5m - 7 = 23
m = 6
y/8 + 11 = 13
y = 16
y/9 - 15 = 5
y = 180
Which math operations are opposite operations?
addition and subtraction
multiplication and division
-2r + 39 = 65
r = -13
7k - 5 = -40
k = -5
k/8 + 6 = -2
k = -64
z/6 - 14 = 3
z = 102
A number right in front of a variable
coefficient
10s + 20 = -50
s = -7
-3x - 32 = -29
x = -1
g/3 + 10 = -40
g = -150
y/9 - 18 = -50
y = -288
The answer to an addition problem is called?
Sum
-5b + 25 = -80
b = 21
-7y - 5y = -96
y = 8
w/5 + 40 = 25
w = -75
d/10 - 80 = -60
d = 200