Mark M. answered 04/12/16
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Mathematics Teacher - NCLB Highly Qualified
19 + (1/7)k = 17
(1/7)k = -2 subtract 19 from both sides
k = -14 multiply both sides by 7.
Note: When posting a fraction coefficient putting the variable in the numerator makes the expression more legible.
E.g., k/7 instead of 1/7k.