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0.25(3+a)=0.5*
We move all terms to the left:
0.25(3+a)-(0.5*)=0
We add all the numbers together, and all the variables
0.25(a+3)-0=0
We add all the numbers together, and all the variables
0.25(a+3)=0
We multiply parentheses
0.25a+0.75=0
We move all terms containing a to the left, all other terms to the right
0.25a=-0.75
a=-0.75/0.25
a=-3
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