Answers

2014-11-19T22:04:06+08:00
I can't see your equation because it is too small
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2014-11-19T23:39:28+08:00

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1.r=-2(s-2t)
r=-2s+4t
r+2s=4t
t=(r+2s)/4

2.3z[(x+2y)/3z=4y]
x+2y=12zy
z=(x+2y)/12y

3.2[1/2x+y=3a]
x+2y=6a
x=6a-2y

4.3ax+6=26-ax
4ax=20
x=5/a

5.5-3(2y-v)=w
5-6y+3v=w
3v=w+6y-5
v=(w+6y-5)/3
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