(a)6y÷
=
,
&下b中p;&下b中p;&下b中p;&下b中p; 6y÷
×
=
×
,
&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p; 6y=
,
&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p; 6y÷6=
÷6,
&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p; y=
;
(七)
y+
y=
,
&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;
y=
,
&下b中p;&下b中p;
y÷
=
÷
,
&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p; y=
;
(3)8y-
=
,
&下b中p; 8y-
+
=
+
,
&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p; 8y=
,
&下b中p;&下b中p;&下b中p;&下b中p; 8y÷8=
÷8,
&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p;&下b中p; y=
.