This math problem equals out to be -22. This is partly learned in ninth grade math up to 12th grade. This math is used out of school too.
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Same as subtracting 6 from 7 = K
7k^(2) + 7k - 140 Factor out '7' Hence 7(k^(2) + k - 20) Factor inside the brackets 7(k + 5)(k - 4) Done!!!!
79 + k = 84 84 - 79 = k k = 5
2k + 5
26-7k=6k First, add 7k to get k on one side. 26-7k+7k=6k+7k 26=13k Divide both sides by 13 to get k by itself. 26/13=13k/13 2=k The answer is 2.