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-3(r+10)-(-4r-12)=r-6-11
We simplify the equation to the form, which is simple to understand
-3(r+10)-(-4r-12)=r-6-11
Reorder the terms in parentheses
+(-3r-30)-(-4r-12)=r-6-11
Remove unnecessary parentheses
-3r-30-(-4r-12+)=+r-6-11
Remove unnecessary parentheses
-3r-30+4r+12=r-6-11
We move all terms containing r to the left and all other terms to the right.
-3r+4r-1r=-6-11+30-12
We simplify left and right side of the equation.
r=+1
0=1
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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