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5r-10=11;5
We simplify the equation to the form, which is simple to understand
5r-10=11;5
We move all terms containing r to the left and all other terms to the right.
+5r=+11+10
We simplify left and right side of the equation.
+5r=+21
We divide both sides of the equation by 5 to get r.
r=4.2
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