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-2(7+5r)=7+2(1-5r)
We simplify the equation to the form, which is simple to understand
-2(7+5r)=7+2(1-5r)
Reorder the terms in parentheses
+(-14-10r)=7+2*(1-5r)
Remove unnecessary parentheses
-14-10r=+7+2+*(+1-5r+)
Reorder the terms in parentheses
-14-10r=7+(+2-10r)
Remove unnecessary parentheses
-14-10r=+7+2-10r
We move all terms containing r to the left and all other terms to the right.
-10r+10r=+7+2+14
We simplify left and right side of the equation.
r=+23
0=23
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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