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40x+.006(30)=9.0
We move all terms to the left:
40x+.006(30)-(9.0)=0
We add all the numbers together, and all the variables
40x+.00630-9=0
We add all the numbers together, and all the variables
40x-8.9937=0
We move all terms containing x to the left, all other terms to the right
40x=8.9937
x=8.9937/40
x=1/4.4475577348588
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