How do you simplify #3r+7-3r#?

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Answer 1 · 2018-03-03T04:39:21

7

#3r + 7 -3r#

There are two 3r in the equation.

One has a positive sign and other has a negative sign.

So , you can just cancel them out.

#=>cancel(3r) + 7 - cancel(3r)#

You are left with

#=> 7#