问题 解答题
解方程.
2.1×(X-0.26)=0.273
2
5
X-
3
8
X=
3
25
答案

(1)2.1×(X-0.26)=0.273,

2.1×(X-0.26)÷2.1=0.273÷2.1,

X-0.26=0.13,

X-0.26+0.26=0.13+0.26,

X=0.39;

(2)

2
5
X-
3
8
X=
3
25

1
40
X=
3
25

1
40
1
40
=
3
25
÷
1
40

X=

24
5

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