-x=3.5

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Solution for -x=3.5 equation: 



-x=3.5

We move all terms to the left:

-x-(3.5)=0

We add all the numbers together, and all the variables

-1x-3.5=0

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

-x=3.5

x=3.5/-1

x=-3+0.5/1

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