Answer :
2/3+3k/4=71/12
= 71/12 - 2/3
=( 71- 8)/12
= 63/12 = 21/4
3k/4 = 21/4
k = 21/4* 4/3
k = 7
= 71/12 - 2/3
=( 71- 8)/12
= 63/12 = 21/4
3k/4 = 21/4
k = 21/4* 4/3
k = 7
2/3 +3k/4 =71/12
3k/4= 71/12-2/3
3k/4= 71/12-8/12
3k/4=63/12
3k*12=63*4
36k=252
k=252/36
k=7
Hope i helped you!