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9.30-3x=9.x=7.
We move all terms to the left:
9.30-3x-(9.x)=0
We add all the numbers together, and all the variables
-3x-(+9.x)+9.30=0
We add all the numbers together, and all the variables
-3x-(+9.x)+9.3=0
We get rid of parentheses
-3x-9.x+9.3=0
We add all the numbers together, and all the variables
-12x+9.3=0
We move all terms containing x to the left, all other terms to the right
-12x=-9.3
x=-9.3/-12
x=2.8181818181818/3.6363636363636
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