Solve for x
x + 18 = 8
x = -10
What is 30% of 50?
15
What is the markup amount on an item that costs the retailer $10 and sells for $14.75?
$4.75
Solve:
8/5 = a/2
a = 16/5
Solve a = b - c for b.
b = a + c
2x - 6 = 10
x = 8
28 is 40% of what number?
70
What is the discount rate of a $20 item that is on sale for $15?
25%
Solve:
b/4 = 13/6
b = 26/3
t = d/r
3(x - 7) = 6
x = 9
15 is what percent of 25?
60%
What is the markup amount of an item purchased for $20 and sold at a store that has a 40% markup rate?
$8
Solve:
6/(n - 3) = 2/5
n = 18
Solve x = 3y - 4z for y.
y = (x + 4z)/3
5(x - 1) + 6 = 3(x + 2) + 9
x = 7
Find the percent change from 40 to 50.
25%
If a store's markup rate is 60%, what is the retail price of a coat the store purchased for $90?
$144
Solve:
7/8 = (y + 3)/5
y = 11/8
Solve for I
R = V/I
I = V/R
(6x - 15)/3 = (x - 2)/2 + x/6
x = 3
20% of those in attendance had never seen a lacrosse match before. How many of the 300 people who attended had previously seen a lacrosse match?
240
What is the markup rate of jeans sold for $55 that a merchant purchased for $40?
37.5%
Solve:
(x - 8)/5 = (x - 11)/6
x = -7
Solve for x:
ax = bx + c
x = c/(a - b)