问题
解答题
解方程.
X÷
7.2X-2X=41.6. |
答案
(1)
×x=8 9
,2 3
×x×8 9
=9 8
×2 3
,9 8
x=
;3 4
(2)x÷
=5 6
,9 10
x÷
×5 6
=5 6
×9 10
,5 6
x=0.75;
(3)7.2x-2x=41.6,
5.2x=41.6,
5.2x÷5.2=41.6÷5.2,
x=8.
解方程.
X÷
7.2X-2X=41.6. |
(1)
×x=8 9
,2 3
×x×8 9
=9 8
×2 3
,9 8
x=
;3 4
(2)x÷
=5 6
,9 10
x÷
×5 6
=5 6
×9 10
,5 6
x=0.75;
(3)7.2x-2x=41.6,
5.2x=41.6,
5.2x÷5.2=41.6÷5.2,
x=8.