Question 627404
{{{f(x) = 3x + 7}}}


{{{f(3b) = 3(3b) + 7}}}


{{{f(3b) = 9b + 7}}}


{{{f(3b)+7 = 9b + 7+7}}}


{{{f(3b)+7 = 9b + 14}}}


So the answer is {{{f(3b)+7 = 9b + 14}}}


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