题目内容
求未知数X的值:
①3.2X-4×
=
②24:X=9:5
③X:18=54:3
④0.5X-
=1.625.
①3.2X-4×
| 1 |
| 4 |
| 1 |
| 5 |
②24:X=9:5
③X:18=54:3
④0.5X-
| 7 |
| 8 |
(1)3.2X-4×
=
,
3.2X-1=
,
3.2X-1+1=
+1,
3.2X÷3.2=1.2÷3.2,
x=0.375;
(2)24:X=9:5,
9X=24×5,
9X÷9=120÷9,
X=13
;
(3)X:18=54:3,
3X=18×54,
3X÷3=972÷3,
X=324;
(4)0.5X-
=1.625,
0.5X-
+
=1.625+
,
0.5X÷0.5=2.5÷0.5,
X=5.
| 1 |
| 4 |
| 1 |
| 5 |
3.2X-1=
| 1 |
| 5 |
3.2X-1+1=
| 1 |
| 5 |
3.2X÷3.2=1.2÷3.2,
x=0.375;
(2)24:X=9:5,
9X=24×5,
9X÷9=120÷9,
X=13
| 1 |
| 3 |
(3)X:18=54:3,
3X=18×54,
3X÷3=972÷3,
X=324;
(4)0.5X-
| 7 |
| 8 |
0.5X-
| 7 |
| 8 |
| 7 |
| 8 |
| 7 |
| 8 |
0.5X÷0.5=2.5÷0.5,
X=5.
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