X-40%X=42 &n...
答案:1 悬赏:30 手机版
解决时间 2021-02-18 11:37
- 提问者网友:做自己de王妃
- 2021-02-18 01:48
X-40%X=42 &n...
最佳答案
- 五星知识达人网友:鱼芗
- 2021-02-18 03:05
(1)X-40%X=42,
(1-40%)X=42,
0.6X=42,
0.6X÷0.6=42÷0.6,
X=70;
(2)120%X-X=24,
(120%-1)X=24,
0.2X=24,
0.2X÷0.2=24÷0.2,
X=120;
(3)65%X-35%X=210,
(65%-35%)X=210,
0.3X=210,
0.3X÷0.3=210÷0.3,
X=700;
(4)(1-75%)X=1,
0.25X=1,
0.25X÷0.25=1÷0.25,
X=4.
(1-40%)X=42,
0.6X=42,
0.6X÷0.6=42÷0.6,
X=70;
(2)120%X-X=24,
(120%-1)X=24,
0.2X=24,
0.2X÷0.2=24÷0.2,
X=120;
(3)65%X-35%X=210,
(65%-35%)X=210,
0.3X=210,
0.3X÷0.3=210÷0.3,
X=700;
(4)(1-75%)X=1,
0.25X=1,
0.25X÷0.25=1÷0.25,
X=4.
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