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Ch. 8 ReTest - Fractional Coefficients
Contribué par: Nativity
Fractional Coefficients
When we get a problem with fractional
coefficients (a fraction before the x), we need
to cancel out that fraction to make it
go away! 
Remember that whatever we do to one
side of the equation, we must do to the
other side of the equation.
Notice that the fractions cancel out:
We show our work in this way:
3
2
3
2
2
3
x = 14
2
3
2
3
x = 14
x = 14
x = 14
3
2
3
2
3
2
=14x3 = 21
       2
Now you try: 
Fill in the fraction that you will multiply by:
5
8
3
4
x = 12
x = 7
7
8
 6
13
x = 21
x = 42
Now you try: 
Find the answer.  Keep it as a simplified fraction.
x = 12
x =
5
8
Here are a number of problems
for you to try.  In each case, you should
get a whole number for the
answer. You may use a calculator, but
you really don't need one - you should be able
to cancel out terms and do the math in
your head.
5
8
9
4
4
7
x = 27
x = 48
x = 15
x =
x =
x =
Now I'm going to try to trick you...
-
Before you  answer, think about the SIGN of
your answer.  Should it be positive or
negative. 
5
8
x = 15
x =
-
-
Try some more - think about the SIGNS
5
8
9
4
4
7
x = 27
x = -48
x = 15
x =
x =
x =
Now complete Part I of your handout.
Click OK once that's complete
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