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30-1.65x=6.9
We move all terms to the left:
30-1.65x-(6.9)=0
We add all the numbers together, and all the variables
-1.65x+23.1=0
We move all terms containing x to the left, all other terms to the right
-1.65x=-23.1
x=-23.1/-1.65
x=14+3.5527136788005E-15/1.65
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