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6.7x+5.1-39.8x-54.6=33.9-8.4x+71.3x+12.6
We move all terms to the left:
6.7x+5.1-39.8x-54.6-(33.9-8.4x+71.3x+12.6)=0
We add all the numbers together, and all the variables
6.7x-39.8x-(62.9x+46.5)+5.1-54.6=0
We add all the numbers together, and all the variables
-33.1x-(62.9x+46.5)-49.5=0
We get rid of parentheses
-33.1x-62.9x-46.5-49.5=0
We add all the numbers together, and all the variables
-96x-96=0
We move all terms containing x to the left, all other terms to the right
-96x=96
x=96/-96
x=-1
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