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-6(-r-12)-6(r+11)=4
We simplify the equation to the form, which is simple to understand
-6(-r-12)-6(r+11)=4
Reorder the terms in parentheses
+(+6r+72)-6*(r+11)=4
Remove unnecessary parentheses
+6r+72-6+*(+r+11+)=+4
Reorder the terms in parentheses
+6r+72+(-6r-66)=4
Remove unnecessary parentheses
+6r+72-6r-66=+4
We move all terms containing r to the left and all other terms to the right.
+6r-6r=+4-72+66
We simplify left and right side of the equation.
r=-2
0=-2
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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