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3.8x+8=1.8x+12
We move all terms to the left:
3.8x+8-(1.8x+12)=0
We get rid of parentheses
3.8x-1.8x-12+8=0
We add all the numbers together, and all the variables
2x-4=0
We move all terms containing x to the left, all other terms to the right
2x=4
x=4/2
x=2
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