Solve Equations Using Subtraction and Division or Addition and Multiplication
The solution for x when you solve the equation
7x + 12 = 26.
What is 2 ?
The solution when you solve the equation
25 - 3x = - 8.
What is x = 11 ?
The solution when you solve the equation
20 = -5(x + 7).
What is x = - 11 ?
The solution when you solve the equation
12(x + 3) - 3x = 117.
What is x = 9 ?
WRITE AN EQUATION & SOLVE: Julie is 3 years older than her sister. Julie's age is 11 years old. How old is her sister?
n + 3 = 11 n = 8
Sister's age is "n"
Julie's sister is 8 years old.
The solution when you solve the equation
x /12 + 13 =18.
What is x = 60 ?
The solution when you solve the equation
70 = 19 - 3x.
What is x = - 17 ?
The solution when you solve the equation - 2(x + 7) = 16.
What is x = - 15 ?
The solution when you solve the equation
- 20 -(4x - 1) = -15.
What is x = -1 ?
Mr. Cushman bought 7 Hannah Montana t-shirts for a total of $90.93. Each t-shirt cost the same amount. How much did each Hannah Montana t-shirt cost?
7n = 90.93 n = 12.99
Each t-shirt cost $12.99
The solution when you solve the equation
- 4 = 9x + 23.
What is - 3 ?
The solution when you solve the equation
- 2x - 47 = - 11.
What is - 18 ?
The solution when you solve the equation
2(11 - 4x) = 38.
What is x = -2 ?
The solution when you solve the equation
-25 + 4(2x + 5) = -61.
What is x = - 7 ?
Tyler has 4 boxes of apples. Each box has the same number of apples. After Tyler eats 3 apples, there are 109 apples left in the boxes. How many apples were in each box?
4a - 3 = 109 a = 28
There were 28 apples in each box.
The solution when you solve the equation
- 10 = 8 - x/7.
What is x = 126 ?
The solution when you solve the equation
- 10 = 8 - x/7.
What is 126 ?
The solution when you solve the equation
10 + 3(x + 2) = 31.
What is x = 5 ?
The solution when you solve the equation
-7x -(10 - x) = -58.
What is x = 8?
Mr. Bucci goes to the grocery store and purchases 17 bags of raisins and a $2.97 jar of peanut butter. His total cost was $34.76. What was the cost for a bag of raisins?
17r + 2.97 = 34.76 r = 1.87
Each bag of raisins cost $1.87
The solution when you solve the equation
3 = x/25 + 6.
What is x = -75 ?
The solution when you solve the equation
-x/9 - 12 = -23.
What is x = 99 ?
The solution when you solve the equation
-2(x - 6) + 7 = 35.
What is x = - 8 ?
The solution when you solve the equation
23 - 7(x + 3) + 5x = 10.
What is x = -4 ?
When you count by ones from any integer, you are counting consecutive integers. Using variables, three consecutive integers are n, n + 1, and n + 2. The sum of three consecutive integers is 48. What are the integers?
n + n + 1 + n + 2 = 48 n = 15
The integers are 15, 16, and 17.