STUDENT HAD THE FOL LOWING :
At this point, the student was confused because her answer
did not match the answer in the back of the book.
Tutor Haydi noticed that the student understood the process of solving for
the variable. However, the student made a mistake while distributing the 3 into
the expression She multiplied each variable
by three rather than treating it as one expression . Haydi explained to the
student that she was only supposed to do that if the variables inside the
parentheses were added or subtracted . For example, if the expression was
then the 3 would be multiplied by each of
the three terms. However, when all the variables are multiplied together, then
the ex pression is only one term and you multiply the number only once. When the
student understood that, she was able to redo the problem and get it right:
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