7 times some other unknown number then add 8
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12 + 8r - 6 = 7r - 5 - 3 8r +6 = 7r -8 r = -14
7 × (r + 8) = 7(r + 8) = 7r + 56
I think you mean r2 -7r -8 = 0. If so, then factor it: (r+1)(r-8) = 0 Then set r+1 = 0, r+1-1=-1, r = -1 Set r-8 =0, r-8+8 = 8 so r = 8
multiply r2+7r+10/3 by 3r-30/r2-5r-50 weegy
how do i solve -3r+3r=-6(7+7r)-7(4-7r)