Checking equations

When checking the equation, all you have to do is take the answer you get after solving the equation and substitute the X with the answer you got and resolve the equation from the beginning.

example: -3x - 5 = -20 ~original equation
+5 +5
---------------
-3x = -15
-- --
-3 -3
---------------
1x = 5 Check~ -3(5) - 5 = -20
-15 - 5 = -20
-20 = -20

Today in class we continued on solving equations. We also learned how to check are answere. To check your answere you need to follow these steps.

First you need to show all your work.

x+12 = 2x+6
-x -x
--------------
12 = 1x=6
-6 -6
--------------
6 = 1x

Checking your work~

x+12 = 2x+6
6+12 = 2(6)+6
18 = 18

thats how you check your work.

Moving Straight Ahead Problem 3.3 hw launch 3.4

Moving Straight Ahead Problem 3.3 hw & 3.4 launch hex

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Moving Straight Ahead Problem 3.3 hex

Moving Straight Ahead Problem 3.3 hex

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Today in class we learned how to solve equations.

An equation states that two quantities are equal.

*Make sure that when you write a equation you define the variables.*

An example of an equation is:

D=5T

D= distance in miles

T= time or number of hours

So if you traveled for 3 hours you would have traveled 15 miles because t=3 and 3*5 equals 15 so you would have traveled for 15 miles in 2 hours.

There is also another kind of equation.

When solving this equation think of maintaining equality, which means keeping something balanced on both sides.

For example if the equation was 85=70+15 and you wanted to make both side 70 you would subtract 15 from 85 and another 15 from 85 (because 70+15= 85-15=70). They now equal 70 on both sides of the equal sign.

Moving Straight Ahead Problem 3.2

Moving Straight Ahead Problem 3.2 hex

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