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7r/3s+3r/4s solve for the equation

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Hello!

7r/3s + 3r/4s =

= 4×7r/4×3s + 3×3r/3×4s =

= 28r/12s + 9r/12s =

= 28r+9r/12s =

= 37r/12s

Good luck! :)

User TKoL
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