Solving by Combining Like Terms
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= Julie's sister's age; n + 3 = 11; n=8
Julie's sister is 8 years old.
Mr. Kutz bought 7 Cost-Co hoodies for a total of $90.93. Each hoodie cost the same amount. How many Cost-Co hoodies did Mr. Kutz buy?
n= # of hoodies; 7n = 90.93; n = 12.99 Each hoodie cost $12.99
Malachi collects video games. He has 4 boxes of games. Each box has the same number of games. After Malachi donates 3 video games, there are 109 games left in the boxes. How many video games were in each box?
a= # of video games in each box; 4a - 3= 109; a = 28 There were 28 video games in each box.
Ms. Brogan goes to the grocery store and purchases 17 bags of skittles and a $2.97 jar of peanut butter. Her total cost was $34.76. What was the cost for a bag of skittles?
s= cost of a bag of skittles; 17s + 2.97 = 34.76; s= 1.87
Each bag of skittles cost $1.87
When you count by ones fronm any integer, you are counting consecutive integers. Using variables, three consecutive integers are n, n + 1, and n + 2. What are the 3 consecutive integers that make a sum of 48?
n + n + 1 + n + 2 = 48 n = 15 The integers are 15, 16, and 17.