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a+3=0.25a
We move all terms to the left:
a+3-(0.25a)=0
We add all the numbers together, and all the variables
a-(+0.25a)+3=0
We get rid of parentheses
a-0.25a+3=0
We add all the numbers together, and all the variables
0.75a+3=0
We move all terms containing a to the left, all other terms to the right
0.75a=-3
a=-3/0.75
a=-4
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