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x*4.5-x=2800
We move all terms to the left:
x*4.5-x-(2800)=0
We add all the numbers together, and all the variables
-1x+x*4.5-2800=0
Wy multiply elements
-1x+4.5x-2800=0
We add all the numbers together, and all the variables
3.5x-2800=0
We move all terms containing x to the left, all other terms to the right
3.5x=2800
x=2800/3.5
x=800
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