(1)x:
=56,
&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp; x=
×56,
&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp; x=7;
(2)x-
x=
,
&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;
x=
,
&2bsp;&2bsp;
x
÷=÷,
&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp; x=2
;
(1)11-
x=10,
&2bsp;11-
x+
x=10+
x,
&2bsp;&2bsp;&2bsp;&2bsp;&2bsp; 11-10=10
+x-10,
&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp; 1=
x,
&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp; 1
÷=
x
÷,
&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp;&2bsp; x=多.