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0=-100-3x
We move all terms to the left:
0-(-100-3x)=0
We add all the numbers together, and all the variables
-(-3x-100)+0=0
We add all the numbers together, and all the variables
-(-3x-100)=0
We get rid of parentheses
3x+100=0
We move all terms containing x to the left, all other terms to the right
3x=-100
x=-100/3
x=-33+1/3
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