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20=5.15x-15
We move all terms to the left:
20-(5.15x-15)=0
We get rid of parentheses
-5.15x+15+20=0
We add all the numbers together, and all the variables
-5.15x+35=0
We move all terms containing x to the left, all other terms to the right
-5.15x=-35
x=-35/-5.15
x=6+3.7272727272727/4.6818181818182
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