Writing Equations
Five less than a number equals 31
n - 5 =31
y + 12 = -3
y = -15
4j = -36
j = -9
57 = -8x - 7
x = -8
-14 is twice a number
-14 = 2n
a - (-2) = 10
a = 8
6 = u/-9
u = -54
1.25r – 7 = 2.5
r = 7.6
Eight more than four times a number is -12
4n + 8 = -12
a - 3.5 = 14.9
a = 18.4
The quotient of a number and 7 is -14. Find the number.
x = -98
1/2b + 9/4 = 7/4
b = -1
The difference between three times a number and 10 is 17.
3n - 10 = 17
k - 1/3 = 5/6
k = 7/6
You earn $7.50 per hour at a fast food restaurant. You earned $123.75 last week. How many hours did you work last week?
h= 16.5
Three more than the product of a number and 4 is 15. Find the number.
n = 3
While on vacation you purchased 4 identical T-shirts for some friends and watch for yourself, all for $75. You know that the watch cost $25. Write an equation to determine the cost of each T-shirt.
4x + 25 = 75
After you deposit $50 into your savings account, the balance is $124. Solve an addition equation to find your balance before this deposit.
$74
The area of a rectangle is 1/2 square inch. The length of the rectangle is 3/8 inch. What is the width of the rectangle?
w = 4/3
If you subtract 3 from twice a number, the result is 25. Find the number.
n = 14