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1/4a+7=12
We move all terms to the left:
1/4a+7-(12)=0
Domain of the equation: 4a!=0We add all the numbers together, and all the variables
a!=0/4
a!=0
a∈R
1/4a-5=0
We multiply all the terms by the denominator
-5*4a+1=0
Wy multiply elements
-20a+1=0
We move all terms containing a to the left, all other terms to the right
-20a=-1
a=-1/-20
a=1/20
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