No, two sides the same is not enough.
You need more proof.
Side, angle, side. (SAS).
AD = DC
Angle ADB = Angle CDB
BD = BD
By the SAS property, the two triangles are the same.
I think this is one way to prove it...
Or, similarly...use ASA, (Angle, side, angle).
X1 + X2 + X3 <27 for all Xi> 0
X1 + X2 + X3 <27 for all Xi> 0, X2 >/ 5
N + d = 30
0.05n + 0.10d = 2.20
^^ ur system of equations
Answer: x=10
Step-by-step explanation:

All the sides are 3 since volume is L*W*H you get 3*3*3 = 9*3 = 27