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2x+(2x+3)=54
We move all terms to the left:
2x+(2x+3)-(54)=0
We get rid of parentheses
2x+2x+3-54=0
We add all the numbers together, and all the variables
4x-51=0
We move all terms containing x to the left, all other terms to the right
4x=51
x=51/4
x=12+3/4
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