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0.2x+x=540000000
We move all terms to the left:
0.2x+x-(540000000)=0
We add all the numbers together, and all the variables
1.2x-540000000=0
We move all terms containing x to the left, all other terms to the right
1.2x=540000000
x=540000000/1.2
x=450000000
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