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.6*90+.4x=83
We move all terms to the left:
.6*90+.4x-(83)=0
determiningTheFunctionDomain .4x-83+.6*90=0
We add all the numbers together, and all the variables
.4x-29=0
We move all terms containing x to the left, all other terms to the right
.4x=29
x=29/.4
x=72+0.2/.4
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