algebra

What is the value of 3t+7 when you know -21t+1=3
I need to know how to figure this out not just the answer. Thank you

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asked by Sammy
  1. 3/3 + 7/3
    t= 2.3333333333333

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    posted by anu
  2. we know -21t+1=3
    -21t = 2
    t = -2/21

    then 3t+7
    = 3(-2/21) + 7
    = -2/7 + 7
    = 47/7

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    posted by Reiny

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