解方程120%x- 11 12 X=6.8 4x+0.4x=70.4 x×(1- 1 4 )=3.6 1 2

解方程120%x- 11 12 X=6.8 4x+0.4x=70.4 x×(1- 1 4 )=3.6 1 2 - 4 5 x= 1 10 3 4 ×(x- 1 3 )=0.
2025-06-24 14:55:15
推荐回答(1个)
回答1:

(1)120%x-
11
12
X=6.8,
17
60
x=6.8,
17
60
x ÷
17
60
=6.8 ÷
17
60

x=24;

(2)4x+0.4x=70.4,
4.4x=70.4,
4.4x÷4.4=70.4÷4.4,
x=16;

(3)x×(1-
1
4
)=3.6,
3
4
=3.6,
3
4
÷
3
4
=3.6 ÷
3
4

x=4.8;

(4)
1
2
-
4
5
x=
1
10

1
2
-
4
5
x +
4
5
x=
1
10
+
4
5
x,
1
2
-
1
10
=
1
10
+
4
5
x -
1
10

2
5
÷
4
5
=
4
5
x ÷
4
5

x=
1
2


(5)
3
4
×(x-
1
3
)=0,
3
4
×(x-
1
3
÷
3
4
=0 ÷
3
4

x-
1
3
+
1
3
=0+
1
3

x=
1
3