Answer:
4
Step-by-step explanation:
first, plug in 6 for k. (it doesn't matter which value you plug in first; you can start with j or k, but i'm just starting with k since that is the variable that comes first in the expression)
2k - 2j => 2(6) - 2j
then plug in 4 for j.
2(6) - 2j => 2(6) - 2(4)
now your expression is 2(6) - 2(4). simplify by multiplying 2(6) and then -2(4) (again, it doesn't matter which one you multiply first, as long as you make sure that the minus sign between 2(6) and 2(4) gets attached to the 2 in 2(4).)
2(6) - 2(4) => 12 - 2(4)
12 - 2(4) => 12 - 8
subtract 8 from 12.
12 - 8 = 4
your answer is 4, therefore when j = 4 and k = 6, 2k - 2j = 4.
i hope this helps! have a nice day <3
