Respuesta :
Answer:
C) x = 18
Step-by-step explanation:
Given equation :
x + 21 = 39
Adding and subtracting 21,
x = 39 - 21
x = 18
Answer:
C) x = 18
Step-by-step explanation:
Given equation :
x + 21 = 39
Adding and subtracting 21,
x = 39 - 21
x = 18