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2x-9=2x-8
We simplify the equation to the form, which is simple to understand
2x-9=2x-8
We move all terms containing x to the left and all other terms to the right.
+2x-2x=-8+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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