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389.84=230+0.72x
We move all terms to the left:
389.84-(230+0.72x)=0
We add all the numbers together, and all the variables
-(0.72x+230)+389.84=0
We get rid of parentheses
-0.72x-230+389.84=0
We add all the numbers together, and all the variables
-0.72x+159.84=0
We move all terms containing x to the left, all other terms to the right
-0.72x=-159.84
x=-159.84/-0.72
x=+222
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