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-3.2r+1.7=13.9r+18.98-15.9r
We simplify the equation to the form, which is simple to understand
-3.2r+1.7=13.9r+18.98-15.9r
We move all terms containing r to the left and all other terms to the right.
-3.2r-13.9r+15.9r=+18.98-1.7
We simplify left and right side of the equation.
-1.2r=+17.28
We divide both sides of the equation by -1.2 to get r.
r=-14.4
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