Respuesta :
Answer:
a = -3
Step-by-step explanation:
a + 18 = 7a
a + 18 - 18 = 7a - 7a -18
a -7a = -18
-6a = -18
-6/6a = -18/6
a = -3
Answer:
a = -3
Step-by-step explanation:
a + 18 = 7a
a + 18 - 18 = 7a - 7a -18
a -7a = -18
-6a = -18
-6/6a = -18/6
a = -3