2、X- 1 12 = 988 3x = 480 X = 6.4 = 7.3
3 、( 1)x=56
(2) x=5
4、X=29 x= 136 x=0 x=6.8
(Inspection omitted)
5.X- 1 16=84 solution: x=84+ 1 16 x=200.
X+3.5=6 Solution: x=6-3.5 x=2.5.
6、x=8 x=560 x=0.2 x= 12.5
(Inspection omitted)
7、4x=36 x=9
18x=450 x=25
8、X= 13.3 x=2.7 x= 15
x=8 10 x=72 x=0.4
9 、( 1)>
(2)=
(3)& lt;
10、 1.6x=5.6 x=3.5
4x= 10 x=2.5
1 1、 12x=3 1.2 x=2.6
9.6y=48 y=45
12、4x=72 x= 18
200+x=450 x=250
13, the price of an exercise book is equal to the price of five pencils.
Textbook 9 pages? Practice?
The weight of African elephants? 33= weight of blue whale
Solution: Suppose this African elephant weighs about X tons.
33x= 165 x=5