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I need help with this

I need help with this-example-1

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ok so you have to make the denominators the same so you would multiply the 3  by the 7 to get 21 and then you would do the same to the 2 and then you can subtract i hope i can help 
User Hari Subramaniam
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5 votes
You have to make the denominators the same so you would multiply the three by seven to get 21 and then you would do the same to two and then you can subtract
User Dmitri Timofti
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