Addition & Subtraction Equations
x - 8 = 3
x = 11
3x = 12
x = 4
Write an inequality for: The number of students the bus holds, s, is less than 40.
s<40
5m+4=19
5m+4-3=19-3
Subtraction Property of Equality
k+6=13
Subtraction
d+9=25
d=16
99=3x
x=33
What is the difference between an inequality whose graph has a closed dot on the number and an inequality whose graph has an open circle on the number?
Closed dot means the number is included in the solution set. Open circle means it is not.
3t=20
3t/2=20/2
Division Property of Equality
c/6=42
multiplication
c-8=25
c=33
7s=245
35
Write an inequality for: The cost, c, is greater than $45.
c>$45
n/6=9
(n/6) x 5 = 9 x 5
5n=30
division
15+b=42
b=27
29=k/5
k=145
Write an inequality for: Tim's age, t, is 21 years old
t=21
5b-6=14
(5b-6)+2=14+2
Addition Property of Equality
p-7=15
addition
x-16=60
x=76
x/3=294
x=882
Name three solutions for the inequality:
X<6
0,1,2,3,4,5
14+s=28
(14+s)-2=28-2
Subtraction Property of Equality
8x=64
division