6r-9=21

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Solution for 6r-9=21 equation:



6r-9=21
We move all terms to the left:
6r-9-(21)=0
We add all the numbers together, and all the variables
6r-30=0
We move all terms containing r to the left, all other terms to the right
6r=30
r=30/6
r=5

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