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5r-1-4r=r+7
We simplify the equation to the form, which is simple to understand
5r-1-4r=r+7
We move all terms containing r to the left and all other terms to the right.
+5r-4r-1r=+7+1
We simplify left and right side of the equation.
r=+8
0=8
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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