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31.50=3.50x
We move all terms to the left:
31.50-(3.50x)=0
We add all the numbers together, and all the variables
-(+3.50x)+31.50=0
We add all the numbers together, and all the variables
-(+3.50x)+31.5=0
We get rid of parentheses
-3.50x+31.5=0
We add all the numbers together, and all the variables
-3.5x+31.5=0
We move all terms containing x to the left, all other terms to the right
-3.5x=-31.5
x=-31.5/-3.5
x=+9
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