问题
解答题
求未知数x. (1)x-
(2)1.2x-x=0.72. |
答案
(1)x-
=1,1 3
x-
+1 3
=1+1 3
,1 3
x=1
;1 3
(2)1.2x-x=0.72,
0.2x=0.72,
0.2x÷0.2=0.72÷0.2,
x=3.6.
求未知数x. (1)x-
(2)1.2x-x=0.72. |
(1)x-
=1,1 3
x-
+1 3
=1+1 3
,1 3
x=1
;1 3
(2)1.2x-x=0.72,
0.2x=0.72,
0.2x÷0.2=0.72÷0.2,
x=3.6.