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78x=300+30x
We move all terms to the left:
78x-(300+30x)=0
We add all the numbers together, and all the variables
78x-(30x+300)=0
We get rid of parentheses
78x-30x-300=0
We add all the numbers together, and all the variables
48x-300=0
We move all terms containing x to the left, all other terms to the right
48x=300
x=300/48
x=6+1/4
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