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12.2x-64=-7
We move all terms to the left:
12.2x-64-(-7)=0
We add all the numbers together, and all the variables
12.2x-57=0
We move all terms containing x to the left, all other terms to the right
12.2x=57
x=57/12.2
x=4+1.952380952381/2.9047619047619
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