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10r+8=2(4r+9)-6
We simplify the equation to the form, which is simple to understand
10r+8=2(4r+9)-6
Reorder the terms in parentheses
10r+8=+(+8r+18)-6
Remove unnecessary parentheses
+10r+8=+8r+18-6
We move all terms containing r to the left and all other terms to the right.
+10r-8r=+18-6-8
We simplify left and right side of the equation.
+2r=+4
We divide both sides of the equation by 2 to get r.
r=2
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