0.3*□-□*0.25=21.15-7*□0.4(x-0.2)+m=0.7x-0.38 where x=6, find the value of m and □.
0.3*□-□*0.25=21.15-7*□0.4(x-0.2)+m=0.7x-0.38其中x=6，求m求□得值．
<gadget id="calculator">4.2 - 0.38 - 2.32</gadget>
<output>1.5</output>

<result>1.5</result>