问题
解答题
解方程. 8x-0.4=1.2 x-
|
答案
(1)8x-0.4=1.2,
8x-0.4+0.4=1.2+0.4,
8x÷8=1.6÷8,
x=0.2;
(2)x-
=3 7
,1 2
x-
+3 7
=3 7
+1 2
,3 7
x=
;13 14
(3)
=0.3 x
,9 0.3
9x=0.3×0.3,
9x÷9=0.09÷9,
x=0.01.
解方程. 8x-0.4=1.2 x-
|
(1)8x-0.4=1.2,
8x-0.4+0.4=1.2+0.4,
8x÷8=1.6÷8,
x=0.2;
(2)x-
=3 7
,1 2
x-
+3 7
=3 7
+1 2
,3 7
x=
;13 14
(3)
=0.3 x
,9 0.3
9x=0.3×0.3,
9x÷9=0.09÷9,
x=0.01.