快!!小六數學呀!!全是方程!唔該!!

1. 16a=32a-64
16a+64=32a-64+64
16a+64-16a=32a-16a
64=16a
16a=64
a=4

2. 10-3m/4=1
10-3m/4 x4= 1x4
10-3m=4
10-3m+3m=4+3m
10=4+3m-4
10-4=3m
3m=6
m=2

3. 40%=2a+3a/10
40% x10= 2a+3a/10 x10
0.4x10= 5a
4=5a
5a=4
a= 0.8

4. b/3+9b= 6 2/3
b/3 + 9b= 20/3 ←變成假分數
b/3 +9b -b/3= 20/3 -b/3
9b= 20-b/3
9b x3= 20-b/3 x3
27b= 20-b
27b+b=20-b+b
28b=20
b= 20/28
b=5/7

5. (a-1) x0.6= a-4
0.6a-0.6=a-4
0.6a-0.6-0.6a= a-4-0.6a
-0.6=1a-4-0.6a
-0.6+4= 0.4a-4+4
3.4=0.4a
0.4a=3.4
0.4a/0.4=3.4/0.4
a= 8.5

1.
16a=32a-64
16a+64=32a-64+64
16a+64-16a=32a-16a
64=16a
64/16=16a/16
4=a
2.10-3m/4=1
10-3m/4*4=1*4
10-3m+3m=4+3m
10-4=4+3m-4
6=3m
2=m
3.40%=2a+3a/10
40%*10=5a/10*10
400%=5a
80%=a
4. b/3+9b=6
b/3+9b-9b=6由3分之2-9b
b/3*3=6由3分之2-9b*3
b=20-18b
b+18b=20-18b+18b
19b=20
b=0.95
5.
(a-1)x0.6=a-4
0.6a-0.6=a-4
0.6a-0.6+4=a-4+4
0.6a+3.4-0.6a=a-0.6a
3.4/0.4=0.4a/0.4
8.5=a

1. 16a=32a-64
64=32a-16a
32a=64
a=64/32=2(ANS)
2. 10-3m/4=1 即4份之10-3m=1
10-3m=4
10-4=3m
6=3m
m=6/3=2(Ans)
3. 40%=2a+3a/10 即 10份之2a+3a
40%= 0.4?,If yes
0.4x10=2a+3a
4=5a
a=4/5=0.8(ANS)
4. b/3+9b=6由3分之2
b+(9b x3)/3=6由3分之2
(b+27b)/3=15/2
2x 28b= 15 x3
56b=45
b=45/56(ANS)
５.(a-1)x0.6=a-4
0.6a-0.6=a-4
0.6a-a=-4+0.6
0.4a=-3.6
a=-3.6/0.4
a=9(ANS)

題目我唔抄啦
1. 64=32a-16a
64=16a
a=64/16
a=4

2. 10-3m=4
-3m=-4-10
m= -6/-3
m=2

3. 40/100*10= 2a+3a
4=5a
a=4/5

4. b/3+9b=20/3
b/3+27b/3=20/3
28b/3=20/3
28b=20
b=20/28
b=5/7

5 0.6a-0.6=a-4
a-0.6a=4-0.6
0.4a=3.4
a=3.4/0.4
a=8.5

功課請自己做，唔識問先生。
:o)