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(2r+4)*4=3*(3r-9)
We simplify the equation to the form, which is simple to understand
(2r+4)*4=3*(3r-9)
Reorder the terms in parentheses
(+8r+16)=3*(3r-9)
Remove unnecessary parentheses
+8r+16=3*(3r-9)
Reorder the terms in parentheses
+8r+16=+(+9r-27)
Remove unnecessary parentheses
+8r+16=+9r-27
We move all terms containing r to the left and all other terms to the right.
+8r-9r=-27-16
We simplify left and right side of the equation.
-1r=-43
We divide both sides of the equation by -1 to get r.
r=43
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