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x*2+x/2=12000
We move all terms to the left:
x*2+x/2-(12000)=0
Wy multiply elements
2x+x/2-12000=0
We multiply all the terms by the denominator
2x*2+x-12000*2=0
We add all the numbers together, and all the variables
x+2x*2-24000=0
Wy multiply elements
x+4x-24000=0
We add all the numbers together, and all the variables
5x-24000=0
We move all terms containing x to the left, all other terms to the right
5x=24000
x=24000/5
x=4800
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