4+-x=-9

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Solution for 4+-x=-9 equation: 



4+-x=-9

We move all terms to the left:

4+-x-(-9)=0

We add all the numbers together, and all the variables

-1x+13=0

We move all terms containing x to the left, all other terms to the right

-x=-13

x=-13/-1

x=+13

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