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-8r+23=20
We simplify the equation to the form, which is simple to understand
-8r+23=20
We move all terms containing r to the left and all other terms to the right.
-8r=+20-23
We simplify left and right side of the equation.
-8r=-3
We divide both sides of the equation by -8 to get r.
r=0.375
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