Writing Equations
six is equal to the difference of a number and eighteen
6=n-18
Kim has $450 in the bank. After buying groceries, she has $398.72 left in her account. How much did she spend at the grocery store?
398.72 + d = 450
$51.28
Is the given number a solution to the equation?
y/2.5 = 1.95
y = 4.875
Yes
2 2/3 + y = 4 1/4
y = 1 7/12
15.95 = 3.19n
n = 5
the product of fourty and a number is one-hundred-twenty
40 x t = 120
Mary ran 27 3/10 miles last week, which was three times as far as Jada ran. How far did Jada run?
3m=27 3/10
m=9 1/10 miles
s + 1/4 = 12 1/2
s = 12 1/4
2/7 w = 3
w = 10 1/2
y/5.4 = 9.01
y = 48.654
Five is equal to three less than twice a number
5=2x-3
Ben had $x in the bank. He withdrew $104.25. Now he has $42.37. How much did he start off with?
x-104.25=42.37
$146.62
Write and solve an equation:
Andre's school has 20 clubs, which is five times as many as his cousin's school. His cousin's school has x clubs.
20=5x
x=4 Clubs
9 1/2 = k/9
k = 81 3/4
15.95 = 3.19n
n = 5
Fifty times a number cubed is two hundred
50 x t3 = 200
Mrs. Jacobs purchased 48 ounces of candy for her class. Each student gets 4 ounces. How many students are in Mrs. Jacobs' class?
4x = 48
12 students
Is the given number a solution to the equation?
x + 12=15
x=27
no
p - 2/3 = 5/6
p = 1 1/2
5 1/3 + j = 7 1/2
j = 2 1/6
The difference of a number and three, divided by two is equal to six
(n-3) / 2 = 6
Hilda can run one mile in 7 1/2 minutes. How far can she run in 67 1/2 minutes? Write and solve the equation
7 1/2x = 67 1/2
9 Miles
z/6 =12
z = 72
7/10 c = 4 1/5
c = 6
a - 4 3/8 = 2 1/2
a = 6 7/8