要考試..........你地可以講解下!!!

1) x=b-a

2) x=d-c

3) x=b+a

4) c-x=d
c=d+x
x=c-d

5)ax+b=c
ax=c-b
x=c-b/a

6)ax-b=c
ax=c+b
x=c+b/a

7)a+bx=c
bx=c+a
x=c+a/b

8)a-bx=c
a=c+bx
a-c=bx
x=a-c/b

9) x=c/a+b

10) x=c/a-b

11) a(x+b)=c
x+b=c/a
x=c/a-b

12) a(x-b)=c
x-b=c/a
x=c/a+b

1.x=b-a
2.x=b-c
3.x=b+a
4.x=d+c
5.x=c-d/a
6.x=c+d/a
7.x=c-a/b
8.x=c+a/b
9.x=c/a+b
10.x=c/a-b
11.x=c-ab/a
12.x=c+ab/a

Very easy!
x=b-a
x=d-c
x=a+b
.... to be continued