
求未知数x.(1)0.4:0.25=12x(2
1个回答
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(1)0.4:0.25=
,
0.4x=0.25×12,
0.4x÷0.4=3÷0.4,
x=7.5;
(2)0.6x+
x-0.2=1
,
x-0.2=1
,
x-0.2+0.2=1
+0.2,
x÷
=
÷
,
x=2.
12 |
x |
0.4x=0.25×12,
0.4x÷0.4=3÷0.4,
x=7.5;
(2)0.6x+
1 |
10 |
1 |
5 |
7 |
10 |
1 |
5 |
7 |
10 |
1 |
5 |
7 |
10 |
7 |
10 |
7 |
5 |
7 |
10 |
x=2.
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