Mark M. answered 01/21/19
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Mathematics Teacher - NCLB Highly Qualified
-5(x + 10) = 3x + 5x + 1
-5(x + 10) = 8x + 1
-5x - 50 = 8x + 1
-50 = 13x + 1
-51 = 13x
-51/13 = x
If the 1 were a 2 then the solution would be a "neat" x = -4.
Check for a typo.