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r+8.2 + 0.4=-8.6
We simplify the equation to the form, which is simple to understand
r+8.2 + 0.4=-8.6
We move all terms containing r to the left and all other terms to the right.
+1r=-8.6-8.2-0.4
We simplify left and right side of the equation.
+1r=-17.2
We divide both sides of the equation by 1 to get r.
r=-17.2
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