Solving by Combining Like Terms
WRITE AN EQUATION & SOLVE: Julie is 3 years older than her sister. Julie's 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. T bought 7 t-shirts for a total of $91. Each t-shirt cost the same amount. How many t-shirts did Mr. T buy?
n - # of t-shirts 7n = 91 n = 13 Each t-shirt cost $13
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?
a - # of apples in each box 4a - 3 = 109 a = 28 There were 28 apples in each box.
Mr. Bucci goes to the grocery store and purchases 17 bags of raisins and a $2 jar of peanut butter. His total cost was $36. What was the cost for a bag of raisins?
r - cost of a bag of raisins 17r + 2 = 36 r = 2 Each bag of raisins cost $2
When you count by ones fron many 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.