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16=3(3-8r)-7(-1+7r)
We simplify the equation to the form, which is simple to understand
16=3(3-8r)-7(-1+7r)
Reorder the terms in parentheses
16=+(+9-24r)-7*(-1+7r)
Remove unnecessary parentheses
+16=+9-24r-7+*(-1+7r+)
Reorder the terms in parentheses
16=+9-24r+(+7-49r)
Remove unnecessary parentheses
+16=+9-24r+7-49r
We move all terms containing r to the left and all other terms to the right.
+24r+49r=+9+7-16
We simplify left and right side of the equation.
+73r=0
We divide both sides of the equation by 73 to get r.
r=0
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