55-x=-90

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Solution for 55-x=-90 equation: 



55-x=-90

We move all terms to the left:

55-x-(-90)=0

We add all the numbers together, and all the variables

-1x+145=0

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

-x=-145

x=-145/-1

x=+145

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