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1/4(20-4)=6-a
We move all terms to the left:
1/4(20-4)-(6-a)=0
We add all the numbers together, and all the variables
-(-1a+6)+1/416=0
We get rid of parentheses
1a-6+1/416=0
We multiply all the terms by the denominator
1a*416+1-6*416=0
We add all the numbers together, and all the variables
1a*416-2495=0
Wy multiply elements
416a-2495=0
We move all terms containing a to the left, all other terms to the right
416a=2495
a=2495/416
a=5+415/416
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