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How can a bar model help us solve equations like 2x + 7 = 25?

How can a bar model help us solve equations like 2x + 7 = 25?. In this lesson you will learn to write and solve equations by using a bar model. A variable is a letter or symbol that represents an unknown number. x = Lisa’s pencils. y = total pens and pencils Lisa has. Δ = bags of chips.

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How can a bar model help us solve equations like 2x + 7 = 25?

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  1. How can a bar model help us solve equations like 2x + 7 = 25?

  2. In this lesson you will learn to write and solve equationsby using a bar model.

  3. A variable is a letter or symbol that represents an unknown number. x = Lisa’s pencils y = total pens and pencils Lisa has Δ = bags of chips

  4. Your class is going on a trip to the state fair. The trip costs $52. Included in that price is $11 for a concert ticket and the cost of 2 passes, one for the rides and one for the games. Each of the passes cost the same price. Write an equation representing the cost of the trip and determine the price of one pass.

  5. x + x + 11 = 52 x x 11 2x + 11 = 52 52

  6. Creating a visual can help in writing and solving an equation. Concert ticket Passes x x 11 52 Total cost

  7. Take away x x x x 11 Cut in half 41 52 41 ÷ 2 = 20.5 x = $20.50

  8. Your class is going on a trip to the state fair. The trip costs $52. Included in that price is $11 for a concert ticket and the cost of 2 passes, one for the rides and one for the games. Each of the passes cost the same price. Write an equation representing the cost of the trip and determine the price of one pass. 2x + 11 = 52 x = $20.50

  9. In this lesson you have learned to write and solve equationsby using a bar model.

  10. Amy has $26 to spend on school supplies. After buying a notebook for $3.50 and 8 pens of equal cost, she had $16.18 left. Using a bar model, write an equation representing the money Amy spent and determine the cost of each pen.

  11. Amy has $26 to spend on school supplies. After buying a notebook for $3.50 and 8 pens of equal cost, she had $16.18 left.

  12. Given a bar model, create an equivalent representation as an equation and word problem.

  13. Given a desk of cards that include different equations, word problems and bar models, find the matching representations that represent the same situation.

  14. David purchased three shirts that cost an equal price as well as a hat for $15. If he spent $47.50 shopping, write an equation that represents the situation and determine the cost of each shirt.

  15. Tiffany withdrew three equal amounts then deposited $13 during the week. At the end of the week her bank account had $56.70. Write an equation to represent Tiffany’s bank account and determine the amount of money withdrew each time.

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