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0.25a-9/4=0
We multiply all the terms by the denominator
(0.25a)*4-9=0
We add all the numbers together, and all the variables
(+0.25a)*4-9=0
We multiply parentheses
0a-9=0
We add all the numbers together, and all the variables
a-9=0
We move all terms containing a to the left, all other terms to the right
a=9
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