Question

a + 3a - 7 = 5a + 3²

Answer 1

a+3a-5a=9+7
-1a=16
a=16: -1
a= -16

Answer 2

Respuesta:

Hola !!

Resolución:

$a + 3a - 7 = 5a + 3^{2}\\\\4a - 7 = 5a + 3^{2}\\\\4a - 7 - 5a = 5a + 9 + 5a\\\\4a - 7 - 5a = 9\\\\4a - 5a = 9 + 7\\\\-a = 16\\\\a = -16$

Bendiciones !!