4r + 9r- 11r +7rSimfly the expressions by combing like terms??
2 answers:
Solve this one in exactly the same way as I solved the one
that you posted 1 minute before this one.
-- add up all the ' r 's .
-- add up all of the just-plain-numbers
This time, the answer looks like 9r .
You should spend a few minutes with it so that
you know where this answer comes from.
9r because 4+9 is 13+7 is 20-11 is 9
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