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1200+15x=500+30x
We move all terms to the left:
1200+15x-(500+30x)=0
We add all the numbers together, and all the variables
15x-(30x+500)+1200=0
We get rid of parentheses
15x-30x-500+1200=0
We add all the numbers together, and all the variables
-15x+700=0
We move all terms containing x to the left, all other terms to the right
-15x=-700
x=-700/-15
x=46+2/3
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