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5(r-3)=10(3r+9)
We simplify the equation to the form, which is simple to understand
5(r-3)=10(3r+9)
Reorder the terms in parentheses
+(+5r-15)=10*(3r+9)
Remove unnecessary parentheses
+5r-15=+10+*(+3r+9+)
Reorder the terms in parentheses
+5r-15=+(+30r+90)
Remove unnecessary parentheses
+5r-15=+30r+90
We move all terms containing r to the left and all other terms to the right.
+5r-30r=+90+15
We simplify left and right side of the equation.
-25r=+105
We divide both sides of the equation by -25 to get r.
r=-4.2
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