问题
解答题
5.4+2X=8.6; 2.5:5=x:8; 0.2=1-
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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+
=1-x 24
+X 24
,x 24
0.2+
-0.2=1-0.2,x 24
×24=0.8×24,x 24
x=19.2.