Addition/Subtraction Equations
Solve the equation:
x - 4 = 10
x = 14
Solve the equation
n/2 = 6
n = 12
Solve
2c + 5 = 13
c = 4
Caleb earns $16 per hour doing yard work. Last month he earned $128.
PART 1: Which equation can be used to determine the number of hours (h) Caleb worked last month?
A. h + 16 = 128 B. 128h = 16 C. 16h = 128 D. h/16 = 128
PART 2: How many hours did Caleb work last month?
PART 1: C
PART 2: 8
Solve the equation:
x + 7 = -9
x = -16
Solve the equation
-30 = 5x
x = -6
Solve
3k + 4 = 10
k = 2
A group of friends spends $56 at the movies.
PART 1: Which equation can be used to determine the amount of friends (f) that went to the movies if each ticket costs $14.
A. 56f = 14 B. 56 + f = 14 C. f + 14 = 56 D. 14f = 56
PART 2: How many friends went to the movies?
PART 1: D
PART 2: 4
Solve the equation:
x + 35 = 15
x = -20
Solve the equation
-72 = 6x
x = -12
Solve:
8x + 14 = -18
x = -4
Adam buys a soda for $3.75. He also buys some cookies that cost $1.50 each. Adam spent a total of $9.75 Write an equation to show how many cookies Adam bought.
3.75 + 1.50x = 9.75 or 1.50x + 3.75 = 9.75
Solve the equation:
x + 3/4 = 5
Solve the equation
6 = -3/5 x
x = -10
At Spring Oak Middle School, 40 band members need to raise a total of $4,250 for a trip. So far, they have raised $1,538.
PART 1: Write an equation to show how much money, in dollars, per band member still needs to be raised for the trip.
PART 2: How much money, in dollars, per band member still needs to be raised for the trip?
Part 1: 40x + 1538 = 4250
Part 2: $67.80
Solve the equation:
x + 3/5 = 6
x = 5 2/5, 5.4. or 27/5
Solve the equation
6 = -3/4 x
x = -8
The 7th grade classes at a middle school are collecting canned goods. The goal is to collect 4,500 cans. There has already been 750 cans collected.
PART 1: Write an equation to show how many cans still need to be collected by each student if there are 125 students participating.
PART 2: How many cans still need to be collected by each student?
PART 1: 125x + 750 = 4500
PART 2: 30