问题
解答题
求未知数X (1)0.4:0.25=
(2)4X-0.36×5=0.6. |
答案
(1)0.4:0.25=
,12 x
0.4X=0.25×12,
X=
,0.25×12 0.4
X=7.5;
(2)4X-0.36×5=0.6,
4X-1.8=0.6,
4X-1.8+1.8=0.6+1.8,
4X=2.4,
4X÷4=2.4÷4,
X=0.6.
求未知数X (1)0.4:0.25=
(2)4X-0.36×5=0.6. |
(1)0.4:0.25=
,12 x
0.4X=0.25×12,
X=
,0.25×12 0.4
X=7.5;
(2)4X-0.36×5=0.6,
4X-1.8=0.6,
4X-1.8+1.8=0.6+1.8,
4X=2.4,
4X÷4=2.4÷4,
X=0.6.