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3(7-2r)=21r-6 how to solve step by step

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Hummmidn
Nobody understands maths and if you do you were sent from heaven
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Answer:

r = 1

Step-by-step explanation:

first you have to expand the brackets.

3 x 7 = 21

3 x -2r = -6r

the equation is now 21-6r = 21r-6

now you simplify it so get the answer r = 1

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