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r+3+2r=21

to solver this equation you have to first simplify then solve. you have to combine same variables.

3r+3=21

-3 -3

you subtract three to get r by itself

(3r=18)/3

you divide by three to get r by itself

Answer

r=6

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15y ago

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Q: R plus 3 plus 2r equals - 21?
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