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28000+x=10000*7000
We move all terms to the left:
28000+x-(10000*7000)=0
We add all the numbers together, and all the variables
x+28000-70000000=0
We add all the numbers together, and all the variables
x-69972000=0
We move all terms containing x to the left, all other terms to the right
x=69972000
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