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-x+7=-6-13
We move all terms to the left:
-x+7-(-6-13)=0
We add all the numbers together, and all the variables
-x+7-(-19)=0
We add all the numbers together, and all the variables
-1x+26=0
We move all terms containing x to the left, all other terms to the right
-x=-26
x=-26/-1
x=+26
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