depends what 'a' =
a + a + a - 2a = 3a - 2a = a
2a+5a+9a = 16a
A equals 20.
a= (+a) or a= (-) b= 2a b= 2a c= (-a) c= (+a)
2a + 3a + 4 = 5a + 4
1
A=2
a = 1
2a+54=38 2a=38-54 2a=-16 a=-16/2 a=-8
2a+12=8 2a=-4 a=-2 So a is -2.
We have, 2a + 24 = 30or, 2a = 30-24or, 2a = 6or, a = 6/2 = 3.Therefore, a equals 3 or simply a=3