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2(a-4)=4a-(2a+9)
We simplify the equation to the form, which is simple to understand
2(a-4)=4a-(2a+9)
Reorder the terms in parentheses
+(+2a-8)=4a-(2a+9)
Remove unnecessary parentheses
+2a-8=+4a-(+2a+9+)
Remove unnecessary parentheses
+2a-8=4a-2a-9
We move all terms containing a to the left and all other terms to the right.
+2a-4a+2a=-9+8
We simplify left and right side of the equation.
a=-1
0=-1
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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