<prompt> Ikiwa 2x-25cdot2x103cdot4x12, x ni nini?  <response>: Kwanza, tunazidisha upande wa kushoto, kupata 5cdot4x-203cdot4x12. Kisha, baada ya kupanga upya masharti, tunapata 2cdot4x32, kuonyesha kwamba 4x16 na x2. 