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7(-2r+3)+r=-13r-39
We simplify the equation to the form, which is simple to understand
7(-2r+3)+r=-13r-39
Reorder the terms in parentheses
+(-14r+21)+r=-13r-39
Remove unnecessary parentheses
-14r+21+r=-13r-39
We move all terms containing r to the left and all other terms to the right.
-14r+1r+13r=-39-21
We simplify left and right side of the equation.
r=-60
0=-60
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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