问题 解答题
5.4+2X=8.6;
2.5:5=x:8;
0.2=1-
X
24
答案

(1)5.4+2X=8.6,

5.4+2X-5.4=8.6-5.4,

2x=3.2,

2x÷2=3.2÷2,

x=1.6;

(2)2.5:5=x:8,

5x=2.5×8,

5x÷5=20÷5,

x=4;

(3)0.2=1-

X
24

0.2+

x
24
=1-
X
24
+
x
24

0.2+

x
24
-0.2=1-0.2,

x
24
×24=0.8×24,

x=19.2.

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