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x+.3x=7000
We move all terms to the left:
x+.3x-(7000)=0
We add all the numbers together, and all the variables
1.3x-7000=0
We move all terms containing x to the left, all other terms to the right
1.3x=7000
x=7000/1.3
x=5384+0.80000000000018/1.3
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