题目内容
| X+40%X=42 | 120%X-X=24 | 80%X=120 | 76%X-21%X=110. |
(1)X+40%X=42,
1.4X=42,
1.4X÷1.4=42÷1.4,
X=30;
(2)120%X-X=24,
0.2X=24,
0.2X÷0.2=24÷0.2,
X=120;
(3)80%X=120,
80%X÷80%=120÷80%,
X=150;
(4)76%X-21%X=110,
0.55X=110,
0.55X÷0.55=110÷0.55,
X=200.
1.4X=42,
1.4X÷1.4=42÷1.4,
X=30;
(2)120%X-X=24,
0.2X=24,
0.2X÷0.2=24÷0.2,
X=120;
(3)80%X=120,
80%X÷80%=120÷80%,
X=150;
(4)76%X-21%X=110,
0.55X=110,
0.55X÷0.55=110÷0.55,
X=200.
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