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a+a+a/2=7500
We move all terms to the left:
a+a+a/2-(7500)=0
We add all the numbers together, and all the variables
2a+a/2-7500=0
We multiply all the terms by the denominator
2a*2+a-7500*2=0
We add all the numbers together, and all the variables
a+2a*2-15000=0
Wy multiply elements
a+4a-15000=0
We add all the numbers together, and all the variables
5a-15000=0
We move all terms containing a to the left, all other terms to the right
5a=15000
a=15000/5
a=3000
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