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28/2+4a/2=3a
We move all terms to the left:
28/2+4a/2-(3a)=0
We add all the numbers together, and all the variables
-3a+4a/2+14=0
We multiply all the terms by the denominator
-3a*2+4a+14*2=0
We add all the numbers together, and all the variables
4a-3a*2+28=0
Wy multiply elements
4a-6a+28=0
We add all the numbers together, and all the variables
-2a+28=0
We move all terms containing a to the left, all other terms to the right
-2a=-28
a=-28/-2
a=+14
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