2 step equations word problems

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Presentation transcript:

2 step equations word problems

2 step equation word problem Ex # 1: A company charges $2 for each balloon in an arrangement and a $3 delivery fee. You have $9 to spend. How many balloons can you purchase?

Ex # 1 set up Let x represent # of balloons Words: (cost of 1 balloon) ( times) (# of balloons) (plus) (cost of delivery) (equals) (total spent) $2.00 * x + $3 = $ 9 2.00x + 3 = 9 - 3 = - 3 2.00x = 6 2.00 2.00 x = 3 (You can purchase 3 balloons)

2 step equation word problem Ex # 2: Tonia had her birthday party at the movies. It cost $27 for pizza and $8.50 per friend for the movie tickets. How many friends did Tonia have at her party if she spent a total of $78.

Ex # 2 set up Let x represent # of friends Words: (cost of 1 friend) ( times) (# of friends) (plus) (cost of pizza) (equals) (total spent) $8.50 * x + $27 = $ 78 8.50x + 27 = 78 - 27 = - 27 8.50x = 51 8.50 8.50 x = 6 (Toya can have 6 friends at her party)

2 step equation word problem Ex # 3: Cristiano is saving money to buy a new bike that costs $189. He has saved $99 so far. He plans on saving $10 each week. In how many weeks will he have enough money to buy the bike?

2 step equation word problem Ex # 3: Answer Define the variable: x = # of weeks Equation: $10x + $99 = $189 x = 9 weeks

2 step equation word problem Ex # 4: Jennifer wants to buy some CD’s that cost $14, and a DVD that cost $23. Write and solve an equations to find out how many CD’s she can buy.

2 step equation word problem Ex # 4: Answer Define the variable: x = # of CD’s Equation: 14x + 23 = 65 x = 3 CD’s

2 step equation word problem Ex # 5: Kittens weigh about 100 grams when born and gain 7 to 15 grams per day. If a kitten weighed 100 grams at birth and gained 8 grams per day, in how many days will the kitten triple its weight?

2 step equation word problem Ex # 5: Answer Define the variable: x = # of days Equation: 8d + 100 = 300 x = 25 (The kitten will triple its weight in 25 days)

2 step equation word problem Ex # 6: Room temperature ranges from 20º C to 25º C. Find the range of room temperature in Fº. Use the formula F – 32 =1.8 C to convert from the Celsius scale to the Fahrenheit scale:

2 step equation word problem Ex # 6: Answers F – 32 = 1.8(20); F = 68 F – 32 = 1.8(25); F = 77 Room temperature ranges from 68 to 77º F

2 step equation word problem Ex # 7: Luis’s cell phone plan cost $39 per month. Text messages cost an additional $0.15 each. If Luis’s cell phone bill last month totaled $55.05. Write and solve an equations to determine how many text messages he sent.

2 step equation word problem Ex # 7: Answers Define the variable: x = # of text messages Equation: $0.15x + 39 = $55.05 x = 107 text messages