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250+100x=300+280x
We move all terms to the left:
250+100x-(300+280x)=0
We add all the numbers together, and all the variables
100x-(280x+300)+250=0
We get rid of parentheses
100x-280x-300+250=0
We add all the numbers together, and all the variables
-180x-50=0
We move all terms containing x to the left, all other terms to the right
-180x=50
x=50/-180
x=-5/18
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