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Bell Work. X = 6 X = 70 X = 10 X = -6. X - 7 = -1 X - 4 = 66 8 = X - 2 -8 = X - 2. Modeling the equation using a bar diagram. 253 Competitors. Use the model to write and solve an equation. X + 134 = 253 or 134 + x = 253. X = 119 boys. Use the model to write and solve an equation.

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bell work
Bell Work
  • X = 6
  • X = 70
  • X = 10
  • X = -6
  • X - 7 = -1
  • X - 4 = 66
  • 8 = X - 2
  • -8 = X - 2
slide4

Use the model to write and solve an equation

X + 134 = 253

or

134 + x = 253

X = 119 boys

slide7

Use the model to write and solve an equation

X + 119 = 134

X = 15 more girls

slide8

A used book costs $17 less than the same book new. The used book costs $9. Use a bar diagram to write and solve an equation to find out how much the new book cost.

?

X – 9 = 17

New book

Used book

X = $26 for a new book

9

17

slide9

Use a bar diagram to write and solve an equation to find out how many hits he got in the second game. .

X – 1 = 5

X = 4 hits in the second game