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140=28.50+20.75x
We move all terms to the left:
140-(28.50+20.75x)=0
We add all the numbers together, and all the variables
-(20.75x+28.5)+140=0
We get rid of parentheses
-20.75x-28.5+140=0
We add all the numbers together, and all the variables
-20.75x+111.5=0
We move all terms containing x to the left, all other terms to the right
-20.75x=-111.5
x=-111.5/-20.75
x=5+4.42857142857/11.8571428571
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