问题
解答题
求求知数x (1)4.5×0.4-
(2)2.4:x=3.5:10.5. |
答案
(1)4.5×0.4-
x=3 4
,3 5
1.8-
x=3 4
,3 5
1.8-
x+3 4
x=3 4
+3 5
x,3 4
1.8-
=3 5
+3 5
x-3 4
,3 5
1.2=
x,3 4
1.2÷
=3 4
x÷3 4
,3 4
x=1.6;
(2)2.4:x=3.5:10.5,
3.5x=2.4×10.5,
3.5x÷3.5=25.2÷3.5,
x=7.2.