Answers

2014-02-02T23:22:14+08:00
Are you trying to look for a? or you are trying to make both equation equal?

if you're trying to look for a:
(8a=10)-(12a+3)=(20a-35)
..... -4a+7 = 20a-35 ...
-4a-20a=-35-7 ....
-24a/-24=-42/-24 ...

a=7/4 or 1.75

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2014-02-04T17:09:09+08:00
if you are you trying to look for a? or you are trying to make both equation equal?

if you're trying to look for a:
(8a=10)-(12a+3)=(20a-35) 
  =  -4a+7 = 20a-35 
   =  -4a-20a=-35-7 
 =  -24a/-24=-42/-24

a=
7 / 4 or 1 3/ 7 or 1. 75
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