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7-7.9x=6.8x+9
We move all terms to the left:
7-7.9x-(6.8x+9)=0
We get rid of parentheses
-7.9x-6.8x-9+7=0
We add all the numbers together, and all the variables
-14.7x-2=0
We move all terms containing x to the left, all other terms to the right
-14.7x=2
x=2/-14.7
x=-1/7.35
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