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6x-15=6x-4
We simplify the equation to the form, which is simple to understand
6x-15=6x-4
We move all terms containing x to the left and all other terms to the right.
+6x-6x=-4+15
We simplify left and right side of the equation.
0x=+11
0=11
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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