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19r-15=-2+19r
We simplify the equation to the form, which is simple to understand
19r-15=-2+19r
We move all terms containing r to the left and all other terms to the right.
+19r-19r=-2+15
We simplify left and right side of the equation.
r=+13
0=13
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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