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7x-9=8x-1x
We simplify the equation to the form, which is simple to understand
7x-9=8x-1x
We move all terms containing x to the left and all other terms to the right.
+7x-8x+1x=+9
We simplify left and right side of the equation.
0x=+9
0=09
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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