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0.7x+x=200
We move all terms to the left:
0.7x+x-(200)=0
We add all the numbers together, and all the variables
1.7x-200=0
We move all terms containing x to the left, all other terms to the right
1.7x=200
x=200/1.7
x=117+1/1.5454545454546
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