4-x=8+5

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Solution for 4-x=8+5 equation: 



4-x=8+5

We move all terms to the left:

4-x-(8+5)=0

We add all the numbers together, and all the variables

-x+4-13=0

We add all the numbers together, and all the variables

-1x-9=0

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

-x=9

x=9/-1

x=-9

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