7-1x+9=20

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Solution for 7-1x+9=20 equation: 



7-1x+9=20

We move all terms to the left:

7-1x+9-(20)=0

We add all the numbers together, and all the variables

-1x-4=0

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

-x=4

x=4/-1

x=-4

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