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6(x-2)+9=2x+4(-1+x)
We simplify the equation to the form, which is simple to understand
6(x-2)+9=2x+4(-1+x)
Reorder the terms in parentheses
+(+6x-12)+9=2x+4*(-1+x)
Remove unnecessary parentheses
+6x-12+9=+2x+4+*(-1+x+)
Reorder the terms in parentheses
+6x-12+9=2x+(-4+4x)
Remove unnecessary parentheses
+6x-12+9=+2x-4+4x
We move all terms containing x to the left and all other terms to the right.
+6x-2x-4x=-4+12-9
We simplify left and right side of the equation.
0x=-1
0=-1
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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