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2x+12=5.4x-20
We move all terms to the left:
2x+12-(5.4x-20)=0
We get rid of parentheses
2x-5.4x+20+12=0
We add all the numbers together, and all the variables
-3.4x+32=0
We move all terms containing x to the left, all other terms to the right
-3.4x=-32
x=-32/-3.4
x=9+1/2.4285714285714
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