Question

13–19k=
–
10+9(
–
k–13)
k=

Answer 1

Solve 13 − 19k = −10 + 9(−k − 13).

Expand the right side: 9(−k − 13) = −9k − 117, so
13 − 19k = −9k − 127.

Add 19k to both sides: 13 = 10k − 127.
Add 127: 140 = 10k.
Divide by 10: k = 14.