Question

21=3x-3 me ajudem pfv

Answer 1

21= 3x-3

3x= 21+3

 x= 24/3

 x= 8

Resposta → S= {8}

Answer 2

$21 = 3x - 3\\3x - 3 = 21\\3x = 21 + 3\\3x = 24\\x  = 24/3\\x = 8$