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72x=450+30x
We move all terms to the left:
72x-(450+30x)=0
We add all the numbers together, and all the variables
72x-(30x+450)=0
We get rid of parentheses
72x-30x-450=0
We add all the numbers together, and all the variables
42x-450=0
We move all terms containing x to the left, all other terms to the right
42x=450
x=450/42
x=10+5/7
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