问题
解答题
解方程.
|
答案
(1)
-5x=0.125,3 8
0.125+5x=
,3 8
0.125+5x-0.125=
-0.125,3 8
5x=0.25,
5x÷5=0.25÷5,
x=0.05;
(2)x:0.2=
,5 8
x÷0.2=
,5 8
x÷0.2×0.2=
×0.2,5 8
x=0.125;
(3)12X+7×0.3=20.1,
12X+2.1=20.1,
12X+2.1-2.1=20.1-2.1,
12X=18,
12X÷12=18÷12,
X=1.5;
(4)
X+1 2
X=1.2,1 3
X=1.2,5 6
X÷5 6
=1.2÷5 6
,5 6
X=1.44.