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4x-9=4x+11
We simplify the equation to the form, which is simple to understand
4x-9=4x+11
We move all terms containing x to the left and all other terms to the right.
+4x-4x=+11+9
We simplify left and right side of the equation.
0x=+20
0=20
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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