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x-0.5x-0.2x=18
We move all terms to the left:
x-0.5x-0.2x-(18)=0
We add all the numbers together, and all the variables
0.3x-18=0
We move all terms containing x to the left, all other terms to the right
0.3x=18
x=18/0.3
x=60
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