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Do Now. On my website under “Math Activities” Arcademic - “Swimming Otters” under Algebra- to practice solving algebraic equations ONLY USE YOUR FIRST NAME as the player name Which weighs more a pound of iron or a pound of feathers? THEY ARE THE SAME

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Do now

Do Now

  • On my website under “Math Activities”

  • Arcademic- “Swimming Otters” under Algebra- to practice solving algebraic equations

  • ONLY USE YOUR FIRST NAME as the player name

  • Which weighs more a pound of iron or a pound of feathers? THEY ARE THE SAME

  • How is the moon like a dollar? THEY BOTH HAVE 4 QUARTERS

    3. What is alive and has only 1 foot? A LEG


1 3 2014 6 1 e solve write subtraction equations

1/3/2014 6-1 E Solve & Write Subtraction Equations


The goal of solving equations

The Goal of Solving Equations…

to get the variable by itself on one side of the equation


Solve x 3 2

X - 3

2

=

Solvex – 3 = 2

Think of this equation as a balance scale.

Whatever you do to one side has to be done to the other to keep it balanced!


Do now

Ex. 1 Solve x – 3 = 2

x – 3 = 2 Write the equation!

+ 3 = + 3 Add 3 from x + 0= 5 each side to “undo”

the subtraction of x = 53 on the left side.


Then check

Then Check!

x – 3 = 2

5 - 3 = 2

2 = 2


Do now

Ex. 2

The difference between the number of people that visit Great Adventure on a Saturday and the number of people that visit the park on a Wednesday is 1,465. Saturday is the busiest day of the week. There are 4,320 visitors on Wednesday. How many visitors are there on Saturday? Write and solve an equation.


Do now

x – 4,320 = 1,465Write the equation.

+ 4,320= + 4,320Subtract 120 from each side.

x= 5,785Simplify.

There were 5,785 visitors to Great Adventure on Saturday.

Check5,785 – 4,320 = 1,465


Ex 3 5 14 j 3 2

Ex. 3 5.14 = j – 3.2

5.14 = j – 3.2 Write the equation!

+ 3.2 = + 3.2 Add 3.2 from 8.34= j each side to “undo”

the subtraction of j = 8.343.2 on the right side.


Then check1

Then Check!

5.14 = j – 3.2

5.14 = 8.34 – 3.2

5.14 = 5.15


Do now

Ex. 4


Do now

Ex. 5


Ex 6 solve 10 y 4

Ex. 6: Solve 10 = y - 4

10 = y – 4 Write the equation!

+ 4 = + 4 Add 4 from each side to “undo” the subtraction of 4 on the right side.

14 = y


Then check2

Then Check!

10 = 14 - 4

10 = 14 – 4

10 = 10


Practice time

Practice Time!

Your Turn!


Solve and

Solve and

  • x - 5 = 9

  • b – 4.4 = 1.6

  • 4 = y - 8

  • 3 = n – 2


Homework

Homework

  • Pg. 330 #1-24 Evens

  • Test Corrections due January 10th

  • Study Quiz Tuesday!


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