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-2(1+8r)=-5(2r-8)
We simplify the equation to the form, which is simple to understand
-2(1+8r)=-5(2r-8)
Reorder the terms in parentheses
+(-2-16r)=-5*(2r-8)
Remove unnecessary parentheses
-2-16r=-5+*(+2r-8+)
Reorder the terms in parentheses
-2-16r=+(-10r+40)
Remove unnecessary parentheses
-2-16r=-10r+40
We move all terms containing r to the left and all other terms to the right.
-16r+10r=+40+2
We simplify left and right side of the equation.
-6r=+42
We divide both sides of the equation by -6 to get r.
r=-7
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