Respuesta :
Answer:
7
Step-by-step explanation:
if 3x=21 then you just have to divide 21 by 3 and the answer would be 7 because 3 times 7 equals 21
Answer:
7
Step-by-step explanation:
if 3x=21 then you just have to divide 21 by 3 and the answer would be 7 because 3 times 7 equals 21