Question 123155
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|2r - 7| + 4 = 11


Add  -4 to both sides


|2r - 7| = 7  So,


2r - 7 =  7  or
2r - 7 = -7


If 2r - 7 =  7
       2r = 14
        r =  7


If 2r - 7 = -7
       2r =  0
        r =  0