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90(r-18)=10(13r+38)
We simplify the equation to the form, which is simple to understand
90(r-18)=10(13r+38)
Reorder the terms in parentheses
+(+90r-1620)=10*(13r+38)
Remove unnecessary parentheses
+90r-1620=+10+*(+13r+38+)
Reorder the terms in parentheses
+90r-1620=+(+130r+380)
Remove unnecessary parentheses
+90r-1620=+130r+380
We move all terms containing r to the left and all other terms to the right.
+90r-130r=+380+1620
We simplify left and right side of the equation.
-40r=+2000
We divide both sides of the equation by -40 to get r.
r=-50
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