MASTHS十分EASY送分題 不過好急下

1. 19b-7b-5b=-53
12b= 53+19
12b=72
b=6

2. 2(2x-1)=6
2x-1=3
2x=2
x=1

3. 3(2-z)=-9
2-z= -3
z=5

4. 16=-8(5p+8)
5p+8=-2
5p=-10
p=-2

19-7b-5b= - 53
53+19=7b+5b
72=12b
b= 6

2(2x-1)=6
4x-2=6
4x=8
x=2

3(2-z)= - 9
6- 3z= -9
6+9= 3z
15= 3z
z= 5

16= -8(5p+8)
16= -40p-64
80= -40p
p= -2

q1: 19-2b= -53
19+ 53 = 2b
b = 72 /2
b= 36

q2: 2(2x-1)=6
2x-1= 6/2
2x = 3+1
x= 4/2
x= 2

q3: 3(2-z)= - 9
2-z = -9/3
2+ 3= z
z= 5

q4: 16= -8(5p+8)
16/ -8 = 5p+8
-2 -8= 5p
p= -10/5
p= -2

1.19-7b-5b= - 53
19-12b=-53
19+53=12b
72=12b
b=72/12
b=6

2.2(2x-1)=6
4x-2=6
4x=6+2
4x=8
x=2

3.3(2-z)= - 9
6-3z=-9
6+9=3z
15/3=z
z=5

4.16= -8(5p+8)
16=-40p-64
16+64=-40p
80=-40p
80/-40=p
p=-2

Hope I can help u^^

1.
19-7b-5b= - 53
12b=-72
b=-6

2.
2(2x-1)=6
4x-2=6
4x=8
x=2

3.
3(2-z)= - 9
6-3z=-9
-3z=-15
z=5

4.
16= -8(5p+8)
16= -40p+64
-48=-40p
p=1.2

2007-10-02 19:46:08 補充：
計錯 sor~4.16= -8(5p 8) 16= -40p-6480=-40pp=-2

2007-10-02 19:47:40 補充：
1. 19-7b-5b= - 53-12b=-72b=6