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7x-14x=1-50
We move all terms to the left:
7x-14x-(1-50)=0
We add all the numbers together, and all the variables
7x-14x-(-49)=0
We add all the numbers together, and all the variables
-7x+49=0
We move all terms containing x to the left, all other terms to the right
-7x=-49
x=-49/-7
x=+7
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