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450=7x-219
We move all terms to the left:
450-(7x-219)=0
We get rid of parentheses
-7x+219+450=0
We add all the numbers together, and all the variables
-7x+669=0
We move all terms containing x to the left, all other terms to the right
-7x=-669
x=-669/-7
x=95+4/7
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