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-12.6+2(x+3)=0.4
We move all terms to the left:
-12.6+2(x+3)-(0.4)=0
We add all the numbers together, and all the variables
2(x+3)-13=0
We multiply parentheses
2x+6-13=0
We add all the numbers together, and all the variables
2x-7=0
We move all terms containing x to the left, all other terms to the right
2x=7
x=7/2
x=3+1/2
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