Remember in basic Algebra we learned that all variables can be substituted as 1's If needed. So lets do that:
-k - 4k = -1 - 4(1) = -5
So now we can rewrite this removing the 1's we put in:
-k - 4k = -5k
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Well, isn't that just a happy little equation we have here! When you multiply 4k by k, you simply multiply the coefficients (4 and 1) to get 4, and then add the exponents of k, which gives you k^2. So, 4k x k equals 4k^2. Just remember, there are no mistakes in math, only happy accidents!
k=-2
-4k + 10 - k + 2 = 2k + 4k + 18Combine all the 'k' terms on the left side:-5k + 10 + 2 = 2k + 4k + 18Combine all the 'k' terms on the right side:-5k + 10 + 2 = 6k + 18Combine the numerical terms on the left side:-5k + 12 = 6k + 18Add 5k to each side:12 = 11k + 18Subtract 18 from each side:-6 = 11kDivide each side by 11:k = -6/11
4k = 28 Therefore, 28/4 = 7 k = 7
One thousand. ie. 4k is 4,000 140k is 140,000