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-x-4+3x=-5-18
We move all terms to the left:
-x-4+3x-(-5-18)=0
We add all the numbers together, and all the variables
-x+3x-4-(-23)=0
We add all the numbers together, and all the variables
2x+19=0
We move all terms containing x to the left, all other terms to the right
2x=-19
x=-19/2
x=-9+1/2
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