One Step Addition and Subtraction E&I
14 = s + 7
S = 7
63 = -9d
d = -7
-8s + 1 = 33
s = -4
-3s ≤ 33
s ≥ -11
A cup of brewed tea has 54 milligrams less caffeine than a cup of brewed coffee. If a cup of tea has 66 milligrams of caffeine, how much caffeine is in a cup of coffee?
c - 54 = 66; c = 120
-1 = q - 8
q = 7
h/-3 = 12
h = -36
5 + 1/7b = -2
b = -2
t/-2 < 6
t > -12
Lalo has 1,500 minutes per month on his cell phone plan. How many more minutes can he use if he already talked for 785 minutes?
785 + m ≤ 1,500
m ≤ 715
y + 15 = 11
y = -4
p/9 = 9
p = 81
2r - 3.1 = 1.7
r = 2.4
h/9 > 1/4
h > 9/4 OR
h > 2.25 OR
h > 2 1/4
There are 8 competitors in each ring for a tae kwon do tournament. If there are 96 competitors in the tournament, how many rings do they need?
8r = 96
r = 12
y + 6 > -13
y > -19
24 = -8x
x = -3
x/13 + 3 ≥ 4
x ≥ 13
-56 ≥ -8x
7 ≤ x
Catie is starting a babysitting business. She spent $26 to make signs to advertise. She charges an initial fee of $5 and then $3 for each hour of service. Write and solve an inequality to find the number of hours she will have to babysit to make a profit.
5 + 3h > 26
h > 7
y - 8 ≤ 5.6
graph
y ≤ 13.6
n/-10 = -4
n = 40
4x - 15 ≤ 5
x ≤ 5
12p > -72
p > -6
Becky wants to buy some fish for her aquarium. She has $20 to spend and the fish cost $2.50 each. Write and solve an inequality to find how many fish Becky can afford.
2.50x ≤ 20; x ≤ 8