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0.3x+13.5=x
We move all terms to the left:
0.3x+13.5-(x)=0
We add all the numbers together, and all the variables
-0.7x+13.5=0
We move all terms containing x to the left, all other terms to the right
-0.7x=-13.5
x=-13.5/-0.7
x=19+0.2/0.7
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