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-x=-3-16
We move all terms to the left:
-x-(-3-16)=0
We add all the numbers together, and all the variables
-x-(-19)=0
We add all the numbers together, and all the variables
-1x+19=0
We move all terms containing x to the left, all other terms to the right
-x=-19
x=-19/-1
x=+19
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