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r-6.4=2.25
We simplify the equation to the form, which is simple to understand
r-6.4=2.25
We move all terms containing r to the left and all other terms to the right.
+1r=+2.25+6.4
We simplify left and right side of the equation.
+1r=+8.65
We divide both sides of the equation by 1 to get r.
r=8.65
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