Any replacement for the variable that makes the equation true is called a solution.

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Any replacement for the variable that makes the equation true is called a solution.

You will do video lecture summaries for 1.2 . Watch the video, take notes and summarize it. Then post under Course Tools , document submission. You may type it, or write it out by hand and either scan it or photograph it. Just make sure it is readable. It should be about one page long. Here is a link to a sample:

Sample Video Summary (2.1)

Any replacement for the variable that makes the equation true is called a solution.

Ex:

Is 6 a solution for 10-y=16

Replace y by 6

10-616 so 6 is NOT a solution

The Addition Principle:

If a=b, then a+c=b+c

Ex y+13= -2

Add -13 to both sides so y+13+(-13)=-2 + (-13)

Y=-15

Ex. Solve:

Add – to both sides:

The Multiplication Principle:

If a=b, then a*c=b*c

Ex. Solve

Multiply both sides by