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x-30=0.5x
We move all terms to the left:
x-30-(0.5x)=0
We add all the numbers together, and all the variables
x-(+0.5x)-30=0
We get rid of parentheses
x-0.5x-30=0
We add all the numbers together, and all the variables
0.5x-30=0
We move all terms containing x to the left, all other terms to the right
0.5x=30
x=30/0.5
x=60
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