第1个回答 2015-06-21
3X-2.5X=2
解:(3-2.5)X=2
0.5X=2
X=4
5(8-X)=1.2
解:8-X=1.2÷5
8-X=0.24
X=8-0.24
X=7.76
2.6X-5.76=X+5.76
解:2.6X-X=5.76+5.76
1.6X=11.52
X=11.52÷1.6
X=7.2
第2个回答 2015-06-21
3x-2.5x=2
0.5x=2
x=4
40-5x=1.2
5x=40-1.2
5x=38.8
x=7.76
2.6x-x=5.76+5.76
1.6x=11.52
x=7.2本回答被提问者采纳
第4个回答 2015-06-21
(1)原式
0.5x=2
x=4
(2)原式
40-5x=1.2
1.2+5x=40
5x=38.8
x=7.76
(3)1.6x=11.52
x=7.2
第5个回答 2015-06-21
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追答我错了
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