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-20.4r+4(1+5r)=48
We simplify the equation to the form, which is simple to understand
-20.4r+4(1+5r)=48
Reorder the terms in parentheses
-20.4r+(+4+20r)=48
Remove unnecessary parentheses
-20.4r+4+20r=+48
We move all terms containing r to the left and all other terms to the right.
-20.4r+20r=+48-4
We simplify left and right side of the equation.
-0.4r=+44
We divide both sides of the equation by -0.4 to get r.
r=-110
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