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12x-3.7x=178
We move all terms to the left:
12x-3.7x-(178)=0
We add all the numbers together, and all the variables
8.3x-178=0
We move all terms containing x to the left, all other terms to the right
8.3x=178
x=178/8.3
x=21+2.17647058824/4.88235294118
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