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-3r+2+4=33
We simplify the equation to the form, which is simple to understand
-3r+2+4=33
We move all terms containing r to the left and all other terms to the right.
-3r=+33-2-4
We simplify left and right side of the equation.
-3r=+27
We divide both sides of the equation by -3 to get r.
r=-9
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