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How do I solve this equation -r+[5r-1]=-3

I have no idea how to do this 

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Mark M. | Mathematics Teacher - NCLB Highly QualifiedMathematics Teacher - NCLB Highly Qualif...
4.9 4.9 (187 lesson ratings) (187)
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-r + [5r - 1] = -3
-r + 5r - 1 = -3
4r - 1 = -3
4r = -2
r = -0.5