Question

k+1=3k-1

Answer 1

2k=2
k=1

Answer 2

yha k = 1

Answer 3

add one on both sides, and u get k+2=3k,
subtract k from both sides, u get 2=2k,
divide by 2,
u get k=1

Answer 4

k-3k=-1-1
-2k=-2
k=1