Answer:
12
Step-by-step explanation:
To solve, substitute the value for k into one of the equations.
We know that k + j= 54.
To get k alone, subtract j. k = -j + 54.
Plug the value of k into the second equation. j = -j + 54 - 30.
Simplify.
j = -j + 24
2j = 24
j = 12
