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74=6+-4x
We move all terms to the left:
74-(6+-4x)=0
We add all the numbers together, and all the variables
-(-4x)+74=0
We get rid of parentheses
4x+74=0
We move all terms containing x to the left, all other terms to the right
4x=-74
x=-74/4
x=-18+1/2
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