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6r-9=7(r+4)-(r-1)
We simplify the equation to the form, which is simple to understand
6r-9=7(r+4)-(r-1)
Reorder the terms in parentheses
6r-9=+(+7r+28)-(r-1)
Remove unnecessary parentheses
+6r-9=+7r+28-(+r-1+)
Remove unnecessary parentheses
6r-9=+7r+28-1r+1
We move all terms containing r to the left and all other terms to the right.
+6r-7r+1r=+28+1+9
We simplify left and right side of the equation.
r=+38
0=38
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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