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438.98=230+0.86x
We move all terms to the left:
438.98-(230+0.86x)=0
We add all the numbers together, and all the variables
-(0.86x+230)+438.98=0
We get rid of parentheses
-0.86x-230+438.98=0
We add all the numbers together, and all the variables
-0.86x+208.98=0
We move all terms containing x to the left, all other terms to the right
-0.86x=-208.98
x=-208.98/-0.86
x=+243
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