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9x+3=-x=3
We move all terms to the left:
9x+3-(-x)=0
We add all the numbers together, and all the variables
9x-(-1x)+3=0
We get rid of parentheses
9x+1x+3=0
We add all the numbers together, and all the variables
10x+3=0
We move all terms containing x to the left, all other terms to the right
10x=-3
x=-3/10
x=-3/10
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