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3r*3/2r=0
We simplify the equation to the form, which is simple to understand
3r*3/2r=0
We move all terms containing r to the left and all other terms to the right.
0=0-4.5
We simplify left and right side of the equation.
0=-4.5
0=-4.5
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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