有數學唔識做

8y-5=28 27=6x+15 4x-7=-19 2-7x=-5
8y=28+5 6x=27-15 4x=-19+7 -7x=-5-2
8y=32 6x=12 4x=-12 -7x=-7
y=32/8 x=12/6 x=-12/4 x=-7/-7
y=4 x=2 x=-3 x=1

8y-5=28
8y=28+5
y=23/8
y=2.875

27=6x+15
6x=27+15
x=42/6
x=7

4x-7=-19
4x=-19+4
x=-15/4
x=-3.75

2-7x=-5
7x=-5-2
x=-7/7
x=-1

3分之x+2=7
3分之x=7-2
3分之5=x
x=3分之5

3分之t+2=7
3分之t=7-2
3分之5=t
t=3分之5

8y-5=28
8y=33
y=4.125

27=6x+15
12=6x
2=x
x=2

4x-7=-19
4x=-12
x=-3

2-7x=-5
-7x=-7
x=1

3分之x+2=7 (2是在分線上)
x+2=21
x=19

3分之t+2=7(2不是在分線上)
3分之t=5
t=15

8y-5=28>>>8y=33,y=4.125
27=6x+15>>>6x=12,x=2
4X-7=-19>>>4x=-12,x=-3
2-7X=-5>>>-7x=-7,x=1
x/3+2=7>>>x/3=5>>>x=15
t/3+1/2=7>>>t/3=11/2>>>t=11/2x3,t=33/2.t=16.5
最後兩題我應無誤會你意思吧
"/" = 除以

2006-12-31 21:17:10 補充：
更正3分之x 2=7 (2是在分線上)(x 2)/3 =7 係唔係??x 2=21,x=19

1.8y-5=28
8y=33
y=4.125

2.27=6x+15
12=6x
x=2

3.4x-7=-19
4x=-12
x=-3

4.2-7x=-5
7=7x
x=1

5.x+2=21
x=19

8y-5=28
8y=32
y=4


27=6x+15
6x+15=27
6x=12
x=2

4X-7=-19
4x=-12
x=-3

3分之x+2=7

3分之x=5
x=15

3分之t+2=7

3分之t=5
t=15