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2(4r+6)=2/5(12r+18)
We simplify the equation to the form, which is simple to understand
2(4r+6)=2/5(12r+18)
Reorder the terms in parentheses
+(+8r+12)=0.4*(12r+18)
Remove unnecessary parentheses
+8r+12=0.4+*(+12r+18+)
Reorder the terms in parentheses
+8r+12=+(+4.8r+7.2)
Remove unnecessary parentheses
+8r+12=+4.8r+7.2
We move all terms containing r to the left and all other terms to the right.
+8r-4.8r=+7.2-12
We simplify left and right side of the equation.
+3.2r=-4.8
We divide both sides of the equation by 3.2 to get r.
r=-1.5
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