Tolong jawab lgi yaaa

21-6/6 + y = 6
21 - 6 + y = 6 x 6
15 + y = 36
y = 36 -15
y = 21

21 + y-1/4 = 8
21 - 1 + y = 8 x 4
20 + y = 32
y = 32 -20
y = 12