BELL WORK X - 7 = -1 X - 4 = 66 8 = X - 2 -8 = X - 2 X = 6 X = 70 X = 10 X = -6

BELL WORK•X - 7 = -1

•X - 4 = 66

•8 = X - 2

• -8 = X - 2

• X = 6

• X = 70

• X = 10

• X = -6

MODELING THE EQUATION USING A BAR DIAGRAM

253 Competitors

Use the model to write and solve an equationX + 134 = 253

or 134 + x = 253

X = 119 boys

Use the model to write and solve an equationX – 15 = 119

X = 134 girls

Use the model to write and solve an equationX + 15 = 134

X = 119 boys

Use the model to write and solve an equationX + 119 = 134

X = 15 more girls

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. 

?

New book

Used book

17 9

X – 9 = 17

X = $26 for a new book

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

USE THE MODEL TO WRITE AND SOLVE AN EQUATION

X + 4 = 7

X = 3

USE THE MODEL TO WRITE AND SOLVE AN EQUATION

X + 2 = 6

X = 4