问题
解答题
解方程. 0.4×40+4x=40 X:42=
|
答案
(1)0.4×40+4x=40,
16+4x=40,
16+4x-16=40-16,
4x=24,
4x÷4=24÷4,
x=6;
(2)X:42=
:10,5 7
10X=42×
,5 7
10X=30,
10X÷10=30÷10,
X=3.
解方程. 0.4×40+4x=40 X:42=
|
(1)0.4×40+4x=40,
16+4x=40,
16+4x-16=40-16,
4x=24,
4x÷4=24÷4,
x=6;
(2)X:42=
:10,5 7
10X=42×
,5 7
10X=30,
10X÷10=30÷10,
X=3.