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-3(x-7.2)=12.6
We move all terms to the left:
-3(x-7.2)-(12.6)=0
We add all the numbers together, and all the variables
-3(x-7.2)-12.6=0
We multiply parentheses
-3x+21.6-12.6=0
We add all the numbers together, and all the variables
-3x+9=0
We move all terms containing x to the left, all other terms to the right
-3x=-9
x=-9/-3
x=+3
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