问题
解答题
解方程.
|
答案
(1)5X-3×
=1.4,7 10
5X-2.1=1.4,
5X-2.1+2.1=1.4+2.1,
5X=3.5,
5X÷5=3.5÷5,
X=0.7;
(2)
X+50%X=2 5
÷18 11
,2 11
0.9X=9,
0.9X÷0.9=9÷0.9,
X=10.
解方程.
|
(1)5X-3×
=1.4,7 10
5X-2.1=1.4,
5X-2.1+2.1=1.4+2.1,
5X=3.5,
5X÷5=3.5÷5,
X=0.7;
(2)
X+50%X=2 5
÷18 11
,2 11
0.9X=9,
0.9X÷0.9=9÷0.9,
X=10.